Atomic Structure & History

The atomic number of an element can be used to predict the number of which of the following?

• protons, neutrons

• protons, electrons

• protons only

• electrons only

Elements in group 18 are called:

• metalloids

• transition elements

• noble gases

• isotopes

Vertical columns of the periodic table are called______.

• groups

• families

• clusters

• periods

Horizontal rows of the periodic table are called_____.

• groups

• families

• clusters

• periods

Protons have a _________charge.

• positive

• negative

• neutral

• none

Electrons have a _______charge.

• positive

• negative

• neutral

• none

What is the atomic number of Boron?

• 5
• 11
• 6

What is the atomic mass of Boron?

• 5
• 11
• 6

An element in Group 16 has how many valence electrons?

• 11

• 4

• 6

• 16

Identify the element that is located in Period 3, Group 18

• Zirconium

• Argon

• Iridium

• Krypton