Chemistry Unit Reveiw

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

• 14
• 28
• 2
• None of these

What's a valence electron?

• electrons in the second energy level
• electrons in the outermost energy level
• the atomic number
• electrons in the first level

What Element does this Bohr Model show?

• Helium

• Hydrogen

• Argon

• Silver

?

• Boron
• Carbon
• Nitrogen
• Lithium

Why do carbon, silicon, and tin all react similarly?

• They are located in the same period

• They have an even atomic number

• They have the same number of energy levels

• They are located in the same group

Is this a correct dot diagram for fluorine (F)

• Yes

• No

How many electrons should Nitrogen have around its Lewis dot model?

• 1
• 3
• 4
• 5

The particles that are found in the nucleus of an atom are

• neutrons and electrons
• electrons only
• protons and neutrons
• protons and electrons

Which of the following element in period 3 would be classified as a metal?

• Boron (B)

• Sodium (Na)

• Argon (Ar)

• Silicon (Si)

A bond between a metal and a nonmetal is called a(n)

• covalent bond

• ionic bond

• metallic bond

• transfer bond