The Periodic Table

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 NUCLEUS (think about the only particle that has a charge)

• +40
• +20
• 20
• -20

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

Tags

NGSS.HS-PS1-1

True or false
Atomic Mass= Protons + Neutrons

• True
• False

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

• Positive
• Negative
• Neutral

When atoms atom loose electrons they have a ________ charge?
(Think about how you would combine -10+30)

• Negative
• Positive
• Neutral

True or false: Chlorine, Bromine and Iodine are highly reactive and have similar chemical properties

• True
• False

Tags

NGSS.HS-PS1-2