Please help asap!! How many groups did Mendeleev's original Periodic Table of Elements have?

A) 18

B) 5

C) 13

D) 8

Answers

Answer 1
The columns, called groups, contain elements with similar chemical behaviours. Six groups have accepted names as well as assigned numbers: for example, group 17 elements are the halogens; and group 18 are the noble gases.




Hope this helps :)

Related Questions

Which of the following is an example of the geosphere interacting with the cryosphere? (5 points)

Erosion due to glaciers creates valleys.
Frost damages the cells in plant tissues.
Plant roots make cracks in rocks and soil.
Metals are obtained from minerals by humans.

Answers

erosion is geosphere and glaciers are cyrosphere

geosphere=Erosions
cryosurgery=glaciers
Hope this helps :))

1.Ridges, tectonic plate boundaries, and hydrothermal vents are physical features found on our planet. Where are these features found MOST OFTEN?

A. in the middle of huge lakes
B. around the edges of deserts
C. at the bottom of Earth's oceans
D. on top of mountains on continents

2.What are mid-ocean ridges?
A. They are areas where tectonic plates meet.
B. They are narrow valleys that run along the bottom of the oceans.
C. They are areas underwater where thick layers of sediment have accumulated.
D. They are areas of underwater mountain chains located near many active volcanoes.

3.Algae and other producers need lots of sunlight. Most ocean algae would be found in the water _____.
A. on the abyssal plain
B. in the oceanic trench
C. above the continental shelf
D. beside the continental slope

4.At which ocean feature would the greatest amount of water pressure be exerted?
A. Trench
B. Abyssal plain
C. Continental shelf
D. Continental slope
Please help thanks

Answers

Answer:

1. D

2. A

Explanation: Those are the only ones i know

What should i put in the box answer for brainliest

Answers

Answer:

4

Explanation:

(6+30)/9

36/9=4

Answer:

4

Explanation:

12(1/2)= 6

5(6)=30

3(3)=9

6+30=36

36/9=4

Which statement is true about the properties of water, hydrogen, and oxygen?

A) Water has the exact same properties as both oxygen and hydrogen.
B)Water has the same properties as hydrogen, but not oxygen.
C)Water has the same properties as oxygen, but not hydrogen.
D)Water has completely different properties than hydrogen and oxygen

Answers

I am pretty sure it’s D
The answer is D for sure if you double check you’ll know your welcome

Please answer this!!!!!!!!!!!!!

Answers

What’s the question?

Answer:

oo ok and please i like your pfp

Consider the following comparison.



The organization of a book and the human body are very similar. First, a book begins with a single word on a page. Second, these words work together to form sentences which are words that are similar to each other. Third, the sentences work together to form a paragraph. Fourth, the paragraphs work together to form an entire chapter. Finally, all of the chapters join together to form a full book. Which statement below correctly compares the levels of organization of a book to the levels of organization of a human.



A.
The chapters in a book are like the cell in a human organism.

B.
The sentences in a book are like the tissues in a human organism.

C.
The paragraphs in a book are like the body systems in a human organism.

D.
The single word on a page is like the full human organism.

Answers

Answer: B yeah I'm pretty sure

Please help due tomorrow

Answers

Answer:

synthesis, single-replacement, double replacement, decomposition, or combustion reaction

Explanation:

pretty sure this is right

BRAINLIEST FOR CORRECT ANSWERS
Match the term with its description.

Terms:


Acid

Alkaline

pH

Ion


Description:


A compound that increases the hydroxide ions (OH−) when it is dissolved in a solution.

A compound that increases hydrogen ions (H+) when it is dissolved in a solution.

An atom or molecule that has a positive or negative charge .

A value from 0 to 14 that is used to specify how acidic or basic a compound is when it is dissolved in water.

Answers

Answer:

A value from 0 to 14 that is used to specify how acidic or basic a compound is when it is dissolved in water.- pH

An atom or molecule that has a positive or negative charge- Ion

A compound that increases hydrogen ions (H+) when it is dissolved in a solution- Acid

A compound that increases the hydroxide ions (OH−) when it is dissolved in a solution- Alkaline

Explanation:

Hope this helps :)

1)Alkaline
2)pH
3) Acid
4)Ion

A student mixed 68 grams of vinegar with 7 grams of baking soda. The solution bubbled as sodium acetate (white solid), carbon dioxide, (gas) and water were produced. If sodium acetate and water in the flask weigh 60 grams, how much carbon dioxide was lost to the environment?

Answers

Answer:

15 grams of carbon dioxide

Explanation:

You would just add 68+7 and that gives you 75. Next subtract 75-68 and that gives you 15.

15 grams hope this helped

Who was settling in Minnesota after the Civil War and why?

Answers

I think it’s the British

What are weather balloons? (3 points)
a Locations with instruments that measure weather conditions in specific land areas

b Numerical equations based on weather-related factors that forecast weather

c Objects that carry instruments into the stratosphere to measure atmospheric conditions

d Structures that orbit Earth in the exosphere to capture images and collect data

Answers

c! objects that carry instruments into the stratosphere to measure atmospheric conditions
The answer is c, they measure the conditions of the atmosphere to gather weather information

Please answer!!!!!!!!!!!!!

Answers

I believe it’s Decreased Humus
humus is the organic component of soil formed by the decomposition of leaves and other plant material by soil microorganisms

Answer:

B. Decreased humus

Explanation:

Who started the website "pintrest"

Answers

Ben Silberman was the creator of Pinterest
Ben Silberman is the creator of pintrest

What’s the difference between a double replacement reaction and a single replacement reaction?

Answers

Answer:

A single-replacement reaction replaces one element for another in a compound. A double-replacement reaction exchanges the cations (or the anions) of two ionic compounds.

Explanation:

Please do this, im posting more! ASAP.

Answers

A warm front is also defined as the transition zone where a warmer air mass is replacing a cooler air mass
Dew point: The point at which air saturated with water vapor produces condensation which forms dew.
Humidity is the state or quality of being humid

The atmosphere is full of nitrogen gas (N2). But plants cannot use nitrogen in this form. Summarize the roles of bacteria in making nitrogen available to plants and in returning nitrogen to the atmosphere.

Answers

They absorb nitrates from the soil into their roots. Then the nitrogen gets used in amino acids, nucleic acids, and chlorophyll. When a plant or animal dies, decomposers like fungi and bacteria turn the nitrogen back into ammonium so it can reenter the nitrogen cycle.

ANSWER IN YOUR OWN WORDS!
How does the pH of an acid compare with the pH of a neutral solution?

Answers

Answer:

A pH of 7 is neutral.A pH of less than 7 is acidic.

Explanation:

KENDİ SÖZLERİNİZDE CEVAP VERİN!
Bir asidin pH'ı, nötr bir çözeltinin pH'ı ile nasıl karşılaştırılır?Derslerinde başarılar dilerim

When was that one moment when you laughed the hardest

Answers

Answer:

last month!!

it was on yt

Answer:

My weightlifting coaches are all gay for each other and its hilarious to see 3 large buff men play fighting and wrestling around the weight room.

What is one benefit of using weather stations, weather balloons, and weather satellites to predict the weather?
a
Ability to change the weather in many different locations from land and space

b
Ability to control the weather in many different locations from land and space

c
Ability to observe the weather in many different locations from land and space

d
Ability to regulate weather in many different locations from land and space

Answers

The answer is C: ability to observe the weather in many locations from land and space
I think the answer is c because it is asking of one benefit of predicting.

To decide on criteria for structure strength to avoid damage from earthquakes, engineers look at ________ to determine __________.

A.old factors; bridge importance

B. the budget; what they can afford to build

C. historical data; earthquake hazard risks

D. future reports; earthquake requirements

Answers

I believe it’s C, it makes the most sense
The answer is C because

Compare and contrast a natural and synthetic resource.

Answers

Natural materials are those that are found in nature and have not been made by humans. By comparison, synthetic materials are man-made and cannot be found in nature.

Answer:

The difference between natural and synthetic material is that natural materials are those that can be found in nature while synthetic materials are those that are chemically produced in a lab. Note that a natural material that is altered physically is still considered a natural material.

Many different materials are used for clothing and other products. Common natural materials include cotton, paper and wool. Common synthetic materials include plastics, which are typically polymers. Synthetic materials are often designed to be stronger and more resistant to damage than any commonly available natural material. There is a limited amount of natural materials available, but a near limitless amount of potential materials that can by synthetically created.

The answer, please!!!!!!!!!1

Answers

Answer:

A. and C.

Explanation:

B. is talking about volcanic rock and D. is talking about Metamorfic rock so A. and c. must be a about sedimentart rock (to be honest i don't understand C. but it definetly isn't B. or D. so it must be C.)

What is it called when to atoms combine?

Answers

Synthesis reaction? Irdk

A compound secreted by honeybees to paralyze intruders in their hive is known as 2-heptanone. The formula for this compound is shown.

How many atoms of each element are in one molecule of 2-heptanone?
F 4 carbon atoms, 11 hydrogen atoms, and 1 oxygen atom
G 7 carbon atoms, 14 hydrogen atoms, and 1 oxygen atom
H 7 carbon atoms, 11 hydrogen atoms, and 8 oxygen atoms
J 6 carbon atoms, 14 hydrogen atoms, and 3 oxygen atoms

Answers

Answer:

- 7 carbon atoms.

- 14 hydrogen atoms.

- 1 oxygen atom.

Explanation:

Hello,

In this case, for the given compound, heptanone, whose chemical formula is:

We can write the molecular formula showing the present atoms of each element:

In such a way we have:

- 7 carbon atoms.

- 14 hydrogen atoms.

- 1 oxygen atom.

Best regards.

To decide on criteria for structure strength to avoid damage from earthquakes, engineers look at ________ to determine __________.
A. old factors; bridge importance
B. the budget; what they can afford to build
C. historical data; earthquake hazard risks
D. future reports; earthquake requirements (please get it right its my summative)

Answers

I think it is B but i am not sure

i  am sorry if this is wrong

B I just answered this

From your list, select one biotic factor and one abiotic factor that you had a negative impact on. Propose a change you could make to prevent the negative impact in the future.

Be sure to include:

one biotic factor (1 point)
one abiotic factor (1 point)
Propose a change you could make to prevent the negative impact in the future. (1 point)

Your answer should include a complete sentence for each factor and explanation.
Be sure to check your grammar and spelling.
Sentence Starter:

One biotic factor I had a negative impact on was...

One abiotic factor I had a negative impact on was...

One way I could change my negative impacts in the future is by...

Answers

Answer:

what list?

Explanation:

HELPPPPP
Which item is made from a basic ingredient?

answer choices

Soda

Wine

Leafy vegetables

Toothpaste

Answers

Answer:

Leafy vegetables?

Explanation:

If by a basic ingredient you mean a single ingredient then the answers is leafy vegetables

A yellow haze in the air caused by particles from cars and factories is _____.
A. acid rain
B. smog
C. oxygen
D. carbon dioxide

Answers

Answer:

b. smog

Explanation:

Answer:

B. Smog

Explanation:

Smog is found in the ozone or a yellow haze in the air caused by particles from cars and factories.

Explain how scientists learned about the magnetic poles of the Earth.
pls, help me w at least 1 sentence.

Answers

Answer:

ocean basalts

Explanation:

As the sea floor slowly spreads, the igneous rock(ocean basalts) of which it is comprised cools and congeals, recording the earth's current magnetic pole alignment.

Choose three different items that are magnetic.

Answers

Answer: magnet, fridge and uh......metal

Explanation:

Answer:

Heres a few, I hope this is what you are talking about :)

Iron

Nickel

Cobalt

Neodymium

Speakers

Earbuds

Headphones

Cabinet Latch

Explanation:

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