If Oxygen (O) has 8 electrons in the atoms electron cloud, then how many protons does it have in the nucleus?

• 3

• 5

• 8

• 12

Tags

NGSS.MS-PS1-1

Nuetrons are a subatomic particle found in the ___________ part of an atom and have this kind of charge, ___________ (N.C.).

• Electron Cloud, Positive
• Nucleus, Nuetral
•  Nucleus, Positive
• Proton, Negitive

Tags

NGSS.MS-PS1-1

An atom has a mass number of 36 and an atomic number of 16, how many neutrons does the atom have?

• 36
• 20
• 16
• 6

Tags

NGSS.MS-PS1-1

Using your periodic table, what element is in the third period and group 2?

• Fe - Iron

• Mg - Magnesium

• Al - Aluminum

• Ca = Calcium

Which two groups on the Periodic Table are the MOST reactive?

• Group 1 and Group 7 (17)

• Group 22 and Group 26

• Group 18

The Atomic Mass is equal to the total number of.....

• protons + electrons
• electrons + neutrons
• protons + neutrons

Elements in the same __________ will have similar chemical properties and the same number of valence electrons.

• Group

• Period

How many electrons does potassium K contain? (click to see image)

• 19
• 39
• 20
• 40

Tags

NGSS.MS-PS1-1

Looking at the Bohr model for Argon (Ar). How many energy levels does it have and number of valence electrons?

• 4 and 8

• 3 and 20

• 4 and 20

• 3 and 8

Tags

NGSS.MS-PS1-1

If my atomic number is 19. Then what element would I be and how many protons would I have.

• Fluorine and 9

• Magnesium and 12

• Potassium and 19

• Krypton and 19

Tags

NGSS.MS-PS1-1