Atomic Structure and the Periodic Table Test

Valence electrons are:

• Electrons farthest away from the nucleus

• Electrons closest to the nucleus

• Electrons in the first two energy levels

How many electrons does this isotope of titanium-48 have?

• 48

• 22

• 26

• 70

How many neutrons does the isotope of lithium-8 have?

• 8

• 3

• 4

• 5

Mg-26 is an istope of Magnesium. What does the 26 represent?

• atomic number

• number of protons

• number of neutrons

• mass number

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

• 11
• 5
• 6
• 16

Tags

NGSS.MS-PS1-1

What quantities vary between isotopes of an element?

• protons, electrons, and mass number

• protons, electrons, and atomic number

• neutrons and electrons

• neutrons and mass number

How many valence electrons does chlorine (Cl) have?

• 2

• 8

• 17

• 7

How many valence electrons does carbon (C) have?

• 3
• 4
• 5
• 6

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

This could be the dot diagram of

• O
• B
• Li
• Ne

Tags

NGSS.HS-PS1-1

How many dots would a Lewis Dot structure of Helium have?

• 1
• 2
• 8
• 0

Tags

NGSS.HS-PS1-1