Quiz about elements & compounds, atoms, chemical formulas

Question 1

What is the main difference between an element and a compound?

Accepted Answer

Elements are made of one type of atom, while compounds are made of two or more types of atoms.

Answer

Elements are made of molecules, while compounds are made of atoms.

Answer

Elements are always gases, while compounds are always solids.

Answer

Elements cannot be found on the periodic table, while compounds can.

Question 2

Identify the number of hydrogen(H) atoms in the chemical formula $$C_6H_{12}O_6$$ .

Accepted Answer

12

Answer

6

Answer

18

Answer

24

Question 3

Which of the following is an example of an element?

Accepted Answer

$$O_2$$

Answer

$$H_2O$$

Answer

$$NaCl$$

Answer

$$CO_2$$

Question 4

How many oxygen elements are present in the chemical formula $$H_2SO_4$$ ?

Accepted Answer

4

Answer

1

Answer

2

Answer

3

Question 5

Which of the following best describes a compound?

Accepted Answer

A substance made of two or more types of atoms chemically bonded together.

Answer

A substance made of only one type of atom.

Answer

A mixture of different elements.

Answer

A substance that cannot be broken down into simpler substances.

Question 6

In the chemical formula $$NaCl$$ , how many sodium (Na) atoms are there?

Accepted Answer

1

Answer

0

Answer

2

Answer

3

Question 7

Which of the following is a compound?

Accepted Answer

$$CO_2$$

Answer

$$O_2$$

Answer

$$H_2$$

Answer

$$N_2$$

Question 8

How many carbon (C) atoms are in the chemical formula $$C_2\left(H_4O_2\right)_3$$ ?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 9

What is the chemical symbol for the element oxygen?

Accepted Answer

O

Answer

Ox

Answer

Oy

Answer

Om

Question 10

Identify the number of nitrogen atoms in the chemical formula $$NH_3$$ .

Accepted Answer

1

Answer

2

Answer

3

Answer

4

Question 11

Which of the following is an element?

Accepted Answer

$$Na$$

Answer

$$H_2O$$

Answer

$$CO_2$$

Answer

$$C_6H_{12}O_6$$

Question 12

How many hydrogen (H) atoms are in the chemical formula $$2CH_4$$ ?

Accepted Answer

8

Answer

4

Answer

2

Answer

6

Question 13

Which of the following best describes an element?

Accepted Answer

A substance made of only one type of atom.

Answer

A substance made of two or more types of atoms chemically bonded together.

Answer

A substance that can be broken down into simpler substances.

Answer

A mixture of different compounds.

Question 14

What is this an example of?

Accepted Answer

compound because it is made up of 2 different elements bonded together

Answer

compound because it is made up of 3 different elements bonded together

Answer

a molecule because it is the same element bonded together

Answer

an element because it is the simplest form of matter

Question 15

Which two statements are true about Nitrogen (N) and Phosphorus (P)?

Accepted Answer

Nitrogen has less protons than Phosphorus.

Accepted Answer

Nitrogen and Phosphorus have the same number of valence electrons.

Answer

Phosphorus has less protons than Nitrogen.

Answer

Nitrogen and Phosphorus have the same number of energy levels.

Question 16

The atomic number also tells you the number of ____________ and ___________ an atom has.

Accepted Answer

protons, electrons

Answer

protons, neutrons

Answer

neutrons, electrons

Question 17

How do you find the number of neutrons an atom has?

Accepted Answer

mass - atomic number

Answer

Its the same as an atoms number of protons

Answer

Its the same as an atoms number of electrons

Answer

Atomic number - mass

Question 18

Which particle has the smallest mass?

Accepted Answer

electron

Answer

neutron

Answer

proton

elements & compounds, atoms, chemical formulas

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science