Chemistry Middle School

Which of the following is a metal?


A. nitrogen

B. calcium

C. sulfur

D. carbon

Answers

Answer 1

Answer:  Calcium

Explanation: The chemical element Calcium (Ca), atomic number 20, is the fifth element and the third most abundant metal in the earth's crust. The metal is trimorphic, harder than sodium, but softer than aluminium.

Hope this helps. pls mark me brainliest :)

Answer 2
The answer is calcium


because it is in group 2 which makes it an alkaline earth metal and a powerful reducing agent that loves to react with nonmetals especially powerful oxidizing agents like fluorine and chlorine.

Related Questions

explain why the sun appers to be the brightest star in the sky. relate your explanation with an example such as street lights. this is science

Answers

Answer:

The sun is a star but It is the brightest in the sky because it is the closest star to earth.

I don't know how to compare it to street lights though...

Explanation:

Which group of elements has the highest boiling point? * IIIa (13) IIa (2) Ia (1) IVa (14) Transition metals

Answers

Answer:

the elements that have the highest boiling is transition metals

How many moles of Hg are in a thermometer that contains 0.055 mL of Hg?

Answers

Answer:

745.8

Explanation:

Answer:

745.8

Explanation:

I hope this helps, and correct I mostly guaranteed is correct.

Which material has the same state of matter after it is mixed with water as it did before it was mixed with water?

A.
carbon dioxide
B.
salt
C.
pepper
D.
sugar

Answers

A or C I’m not quite sure, pls correct me

Pepper has the same state of matter after it is mixed with water.

What is the state of matter?

State of matter of any substance tells about the physical appearance or the space occupied by the atoms of that substance.

From the given option; carbon dioxide, salt and sugar are soluble in water and changes their state of matter to liquid. But pepper is hydrophobic in nature that means it is not soluble in water, so present in the original state after mixing with water.

Hence, option (c) is correct i.e. pepper has the same state.

To learn more about state of matter, visit the below link:

https://brainly.com/question/16982523

What is one advantage of developing energy-efficient technologies?

Answers

Answer:

it's simple

Explanation:

For residential buildings, a whole-house approach using a cost-effectiveness criterion can result in savings of 50 percent or more in heating and cooling and 30–40 percent reductions in total energy use.

I hope you understand have a great day :3

One advantage of developing energy-efficient technologies, would be less waisted money on electricity.

The most useful property of metalloids is their _____.

A. stored energy which is released through combustion

B. being non-reactive with other elements

C. value when used to make precious jewelry

D. varying ability to conduct electricity

Answers

Answer:

DDDDDDDDDDDDDDDDDD

Explanation:

i just answer this it's corect trust meee

If an atom does not bond to another, The number of electrons does not change. True or false?
Please help!

Answers

the answer is true .....
your answer is true!!

Which metals are so reactive that they are never found as uncombined elements in nature?

A. alkaline earth metals

B. alkali metals

C. rare earth metals

D. transition metals

Answers

B

This element is rare and it reacts very quickly to other elements

Watch the video below. After the video use the text box to answer the following questions:

1. What is the difference between and autotroph and a heterotroph?

2. What is one example of an autotroph. One example of a heterotroph.

Please help the video isn't necessary for these questions :)

Answers

autotrophs are producers and they prepare their own food. heterotrophs are consumers that depend on other sources for their food.

autotroph ex. plants, algae, some types of bacteria

heterotroph ex. dogs, birds, all humans
^ , i argee with them .

I would appreciate your help! Due today! ( I don't know if this is even chemistry)

Answers

Answer:

6+69

Explanation:

this is the photo of the first page
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