SCH4U Unit 2 Structures and Properties of Matter

What atom matches this electron configuration?
1s²2s²2p⁶3s²

• Neon
• Magnesium
• Aluminum
• Potassium

Tags

NGSS.HS-PS1-1

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

• 3
• 6
• 8
• 10

Tags

NGSS.MS-PS1-1

Identify the Electron Configuration for Aluminum (Al)

• 1s² 2s² 2p⁶ 3s² 3p¹
• 1s² 2s² 2p⁶ 3s² 3p³
• 1s² 2s² 2p⁶ 3s² 4p¹

Tags

NGSS.HS-PS1-1

How many valence electrons are represented here?

• 7
• 5
• 2
• 8

Tags

NGSS.HS-PS1-1

How many electrons can the d sublevel hold?

• 8
• 10
• 2
• 4

Emission of light from an atom occurs when an electron

• drops from a higher to a lower energy level.
• jumps from a lower to a higher energy level.   
• moves within its atomic orbital.
• falls into the nucleus.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

What is the shorthand electron configuration for Sulfur atom? (Unfamiliar Situation)

• [Ar] 3p⁴
• [He] 3s²3p⁴
• [Ne] 3s²3p⁴
• [Na] 3s²3p³
  

Tags

NGSS.HS-PS1-1

What element in Period 4 has 5 valence electrons? (Unfamiliar Situation)

• Zr
• As
• V
• Sb

Tags

NGSS.HS-PS1-1

As you move down the periodic table atoms get bigger.  This is because ____________. (Unfamiliar Situation)

• The atoms have more mass.
• The atoms have more protons.
• The atoms have more energy levels
• The atoms have more neutrons

True or False - The amount of weight of matter is conserved when it changes form, even in transitions in which it seems to vanish.

• True

• False