Electron Configuration

What atom matches this electron configuration?
1s²2s²2p⁶3s²

• Neon
• Magnesium
• Aluminum
• Potassium

What electron configuration matches an oxygen atom?

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶4s²3d¹

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

• 14
• 28
• 2
• 4

How many electrons can the first energy level hold?

• 1
• 2
• 8
• 0

The electron configuration of an atom is 1s²2s²2p⁶.  The number of electrons in the atom is 

• 3
• 6
• 8
• 10

What do you start electron configuration with?

• 1s²
• 1d¹⁰
• 1f¹⁴
• 1p⁶

There are 4 different types of subshells s,p,d,f

• true
• false

How are elements arranged in the periodic table?

• in alphabetical order
• in the order in which they were discovered
•  in order of increasing atomic number
•  in order of increasing melting points

The vertical columns in the periodic table are known as:

• groups
• periods
• valences
• isotopes

Group 18 of the periodic table contains nonreactive elements like helium, neon, and argon. The elements in this group are called:

• alkali metsls
• transition metals
• halogens
• noble gases