Semester Exam

Which particles make up the nucleus of an atom?

• protons and neutrons
• electrons and protons
• electrons, protons, and neutrons
• electrons and neutrons

An element with a mass number of 10 and an atomic number of 6 has how many protons?

• 5
• 8
• 6
• 10

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

• 14
• 28
• 2
• 4

Group 18 elements are known as the _____ _____ and have full valence shells.

• royal gases.
• supreme solids.
• noble gases.
• legit liquids.

Which elements have the most similar chemical properties?

• K and Na
• K and Ca
• K and Cl
• K and S

An element's identity is determined by the number of

• electrons.
• protons.
• neutrons.
• valence.

Beryllium is in group number______.

• Group 2
• Group 3
• Group 4
• Group 7

The period for Bromine is ___________.

• 3
• 2
• 4

How many Valance electrons does Iodine Have?

• 6
• 16
• 7
• 17

Which of the following has six valence electrons?

• Sodium
• Iodine
• Oxygen
• Neon