Ions and Isotopes

What is the mass number of bromine?

• 35

• 45

• 80

• 79.904

What is a representation of an ion?

• Li

• Na-22

• O^-2

If an atom loses an electron it is a(n)

• Positive ion
• Negative ion
• Isotope
• Neutral Atom

If an atom gains an electron it is a(n)

• Positive ion
• Negative ion
• Isotope
• Neutral Atom

What charge does an electron have?

• positive
• negative
• neutral
• no charge

Tags

NGSS.MS-PS2-3

which atom has 4 neutrons?

• Li-6

• Li-7

• Li-8

• they have the same # of neutrons

Tags

NGSS.MS-PS1-1

Atoms become ___________ when their outer energy shell (valence shell) is full.

• Stable

• Unstable

Tags

NGSS.HS-PS1-1

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

Tags

NGSS.HS-PS1-8

Valence electrons means..

• Electrons inside the atoms

• Electrons on the outer most energy level

• Electrons with no charge

• Electrons that are stable

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

This isotope have how many neutrons?

• 26

• 12

• 14

• 16

Tags

NGSS.MS-PS1-1