Atomic Structure and Periodic Table

What is an atom's nucleus made of?

• protons and electrons

• protons and neutrons

• protons only

• neutrons only

What is a proton's charge?

• negative

• no charge

• positive

• positive and negative

What is an electron's charge?

• negative

• no charge

• positive

• positive and negative

When you add protons plus neutrons, what do you get?

• atomic number

• electrons

• element symbol

• mass number

The groups in a periodic table are:

• horizontal rows

• vertical columns

• diagonal

• the very bottom two rows

The periods in a periodic table are:

• horizontal rows

• vertical columns

• diagonal

• the very bottom two rows

How many valence electrons does an atom of carbon have?

• 6

• 12.011

• 4

• 14

How many valence electrons does an atom of bromine have?

• 8

• 35

• 79.904

• 7

Which element has an atomic number of 73?

• Tungsten

• Cadmium

• Rubidium

• Tantalum

Which element is in the alkali metals group?

• potassium

• neon

• antimony

• magnesium