Atoms

Question 1

At the core of each atom is a _______?

Answer 1

Nucleus

Question 2

Nucleus is composed of ________ and _______ ?

Answer 2

Positively charged protons and uncharged neutrons

Question 3

What is an atomic number?

Answer 3

The number of protons in the nucleus

Question 4

What is the atomic mass?

Answer 4

The number of protons and neutrons combined

Question 5

What is the atomic mass?

Answer 5

The number of protons and neutrons combined

Question 6

What are molecules?

Answer 6

Particles of matter that are composed of one or more atom

Question 7

What is matter?

Answer 7

Anything that occupies space and has mass

Question 8

What is the smallest unit of matter?

Answer 8

Atom

Question 9

What are atoms used for?

Answer 9

To build more complicated substances in the body

Question 10

What is an element?

Answer 10

Pure substance made up of only one kind of atom

Question 11

One example of a an element?

Answer 11

Oxygen

Question 12

What is an element?

Answer 12

Pure substance made up of only one kind of atom

Question 13

What are atoms composed of?

Answer 13

Protons, electrons, and neutrons

Question 14

How many electrons can one orbital hold?

Answer 14

Only two

Question 15

The ________ an orbital extends from the nucleus the ______ its energy level.

Answer 15

Farther, higher

Question 16

What are electrolytes?

Answer 16

Compounds that form ions when dissolved in water

Question 17

When does a covalent bond form?

Answer 17

When atoms share electrons

Question 18

How is a atom neutral?

Answer 18

If their is one electron for every proton

Question 19

Why is a chemical formula used?

Answer 19

To describe which atoms are present in a compound

Question 20

When is a atom chemically stable?

Answer 20

When its outer energy level is full

When its energy shells have the maximum number of electrons they can hold