Atoms, Elements, Compounds, Mixtures

The smallest piece of matter that still has the properties of an element is a(n)

• molecule

• atom

• nucleus

• electron

Tags

NGSS.MS-PS1-1

Which subatomic particle has a positive charge?

• proton

• electron

• neutron

• atom

How many protons are there in an atom with an atomic number of 23 and an atomic mass of 51?

• 23

• 28

• 51

• 74

Tags

NGSS.MS-PS1-1

How many electrons are there in a neutral atom with 8 protons and an atomic mass of 16?

• 8

• 16

• 24

• 32

Tags

NGSS.MS-PS1-1

An atom has no overall charge if it contains an equal number of

• neutron and protons

• electrons and protons

• neutrons and electrons

• none of the above

The identity of an atom is determined by its

• mass number

• atomic number

• overall charge

• number of neutrons

An atom of Carbon with 7 protons, 7 electrons, and 8 neutrons would have an atomic mass of

• 7

• 22

• 14

• 15

Tags

NGSS.MS-PS1-1

Which of the following has the LEAST mass

• protons

• neutrons

• electrons

• nucleus

The nucleus of an atom is made up of

• electrons and neutrons

• protons and neutrons

• neutrons

• electrons, protons & neutrons

Tags

NGSS.MS-PS1-1

How many electrons can the K shell hold?

• 2

• 4

• 8

• 18