atoms and molecules

Question 1

In an atom, protons are equal to the number of ________.

Answer 1

electrons

Question 2

Where are protons, neutrons and electrons found?
protons:
neutrons:
electrons:

Answer 2

protons: in the nucleus
neutron: within the nucleus
electron: around the nucleus

Question 3

Formula of finding neutrons

Answer 3

Proton number - mass number

Question 4

What are isotopes?

Answer 4

Isotopes are atoms of the same element with the same number of protons, but different number of neutrons.

Question 5

How are molecules formed?

Answer 5

A molecule is formed when 2 or more atoms are chemically combined.

Question 6

What does a molecule of a compound consist of?

Answer 6

A molecule of a compound consists of two or more types of atoms that are chemically combined.

Question 7

What is a molecule?

Answer 7

A molecule is two or more atoms chemically combined.

Question 8

Each element is made up of _____ and each element consists of only _____ type of atom

Answer 8

Each element is made up of atoms and each element consists of only one type of atom