Periodic Table

A elements ________ can be determined by looking at the number of protons.

• Atomic Mass
• Atomic Number
• Reactivity
• Charge

The electrons in the outermost energy level of an atom that influence how an element will react with other substances______________

• Neutron
• Anion
• Reactive electron
• Valence electron

The ________ is the tiny, dense, positivly charged region in the center of an atom made up of protons and neutrons

• The center
• Electron Cloud
• Nucleus
• Energy shells

Electrons are found in the__________

• Atom
• Nucleus
• Electron cloud
• All of the above

A atom has 20 protons, 20 neutrons and 20 electrons; what is the charge of the ATOM (Look at protons and electrons)

• Neutral
• Negative
• Positive

True or false: n neutral atoms the number of protons and electrons will always be the same?

• True
• False

Name that element!
Period 2
Group 14

• Boron
• Oxygen
• Carbon
• Nitrogen

True or false
Atomic Mass= Protons + Neutrons

• True
• False

True or False
We find neutrons by subtracting……
N=AM-AN

• True
• False

When atoms pick up extra electrons they have a ________ charge
(Think about combining integers in math class)

• Positive
• Negative
• Neutral