Atomic Structure

What is the atomic number of an element with 14 protons?

• 14

• 28

• 7

• 42

How many electrons fit into the first electron shell?

• 2

• 8

• 18

• 30

How many electrons fit into the second electron shell?

• 2

• 8

• 18

• 30

How many electrons fit into the third electron shell?

• 2

• 8

• 18

• 30

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Which subatomic particle determines the identity of an element?

• protons

• neutrons

• electrons

What is the mass number of this atom?

• 1

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1

Most of the mass in an atom is made up of _____________________?

• protons and electrons

• protons and neutrons

• neutrons and electrons

• electrons and quarks

Tags

NGSS.MS-PS1-1

DIFFERENT kinds of atoms chemically combined to form a substance are

• Mixture

• Element

• Compound

• Substance

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

• 20

• 10

• 35

• 25