Quiz about Atoms, molecules, and compounds practice

Question 1

How many atoms are in this formula? $$H_2O$$

Accepted Answer

3

Answer

2

Answer

5

Answer

1

Question 2

How many elements are in this molecule? $$C_6H_{12}O_6$$

Accepted Answer

3

Answer

24

Answer

12

Answer

18

Question 3

Which of the following chemical formulas represents a compound?

Accepted Answer

$$H_2O$$

Answer

$$H_2$$

Answer

$$O_3$$

Answer

$$Ca_2$$

Question 4

Sodium has an atomic number of 11, how many protons does this atom have?

Accepted Answer

11

Answer

12

Answer

23

Answer

It doesn't have protons

Question 5

What is the picture displaying?

Accepted Answer

A compound

Answer

An element

Answer

An atom

Answer

A nucleus

Question 6

Which of these is a compound?

Accepted Answer

Salt

Answer

Iron

Answer

Potassium

Answer

Calcium

Question 7

How would $$H_2O$$ be classified? Click ALL that apply.

Accepted Answer

Molecule

Accepted Answer

Compound

Answer

Element

Answer

Atom

Question 8

How would $$O_2\ $$ be described?

Accepted Answer

A molecule

Answer

An atom

Answer

A compound

Question 9

How many atoms are in this formula? $$CaCO_3$$

Accepted Answer

5

Answer

4

Answer

3

Answer

9

Question 10

What is the term for combining 2 or more atoms together?

Accepted Answer

Molecule

Answer

Compound

Answer

Element

Answer

Atom Group

Question 11

What is the total number of atoms in an ammonia (NH₃) molecule?

Accepted Answer

4

Answer

3

Answer

2

Answer

5

Question 12

What are the three particles that make up an atom?

Accepted Answer

Electrons, Neutrons, Protons

Answer

Protons, Neutrons, Ions

Answer

Elections, Neuters, Proteins

Answer

Protons, Isotopes, Electrons

Question 13

When there is no subscript after an element's symbol, it means there are how many atoms of that element?

Accepted Answer

only 1

Answer

none

Answer

exactly 2

Answer

the atomic number

Question 14

The central region of an atom where its neutrons and protons are is called the

Accepted Answer

The nucleus

Answer

The Core

Answer

The cloud

Answer

The orbital

Question 15

What is the atomic mass of "F" Fluorine?

Accepted Answer

19

Answer

9

Answer

18

Question 16

Which number is the atomic number?

Accepted Answer

1

Answer

1.008

Answer

This element doesn't have one

Answer

2

Question 17

Which of the following is not a compound?

Accepted Answer

$$Cl_2$$

Answer

NaCl

Answer

$$CO_2$$

Answer

HCl

Question 18

Which is a molecule? A, B, or Both?

Accepted Answer

Both

Answer

A

Answer

B

Question 19

How many elements are in this formula? $$H_3PO_4$$

Accepted Answer

3

Answer

7

Answer

8

Answer

2

Question 20

True or False? These are all compound molecules.

Accepted Answer

True

Answer

False

Atoms, molecules, and compounds practice

20 questions

Which of the following chemical formulas represents a compound?

Sodium has an atomic number of 11, how many protons does this atom have?

What is the picture displaying?

Which of these is a compound?

What is the term for combining 2 or more atoms together?

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