Atom & Isotope Review

Which of these determines the identity of an atom?

• proton

• neutron

• valence electron

• protons and neutrons

How do you determine how many Neutrons an atom has?

• Protons + Valence Electrons

• Atomic Mass - Atomic Number

• Atomic Mass + Atomic Number

• Protons + Electrons

What do we call a substance that consists of only one type of atom?

• Atom

• Element

• Compound

• Substance

_______ are atoms with the same number of protons but varying numbers of neutrons.

• ions

• elements

• allotropes

• isotopes

Tags

NGSS.MS-PS1-1

What is the atomic number for an element with three protons?

• 2
• 1
• 3
• 6

If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?

• 12 neutrons
• 12 electrons
• 12 protons
• 24 protons and neutrons

Tags

NGSS.MS-PS1-1

What is the mass number?

• The average atomic mass
• the number of protons and neutrons in the nucleus
• the number of protons in the nucleus
• the number of protons and electrons in the nucleus

An isotope of Carbon has 7 neutrons, what is its mass number?

• 7
• 6
• 13
• 1

Tags

NGSS.MS-PS1-1

How many protons in Neon - 22?

• 22
• 10
• 12
• 32

Tags

NGSS.MS-PS1-1

Most of the mass of an atom is contained in the ____?

• nucleus
• electron cloud