Electronic Configuration

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

• 14
• 28
• 2
• 4

Tags

NGSS.MS-PS1-1

How many electrons can the first energy level hold?

• 1
• 2
• 8
• 0

The atomic number tells you...

• the number of protons

• the number of neutrons

• the number of electrons

What charge do electrons have?

• Positive

• Neutral

• Negative

Tags

NGSS.MS-PS2-3

How many electrons can the third shell have?

• Two

• Eight

• Five

• Three

Tags

NGSS.MS-PS1-1

Which two particles are contained in the nucleus of an atom?

• Protons and Neutrons

• Protons and Electrons

• Electrons and Neutrons

Tags

NGSS.MS-PS1-1

Chemists can identify the composition of some unknown salts by conducting a flame test. When potassium salts are heated in a flame, a purple color is observed.

This is due to the movement of electrons between energy levels. What is the electron configuration of a potassium atom at ground state?

• 1s²; 2s²; 2p⁶; 3s²; 3p⁶; 4d¹

• 1s²; 2s²; 2p⁶; 3s²;3p⁶; 3d¹

• 1s²; 2s²; 2d⁶; 3s²; 3d⁶; 4s¹

• 1s²; 2s²; 2p⁶; 3s²; 3p⁶; 4s¹

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What atom matches this electron configuration?
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

• Zinc
• Copper
• Nickel
• Germanium

Tags

NGSS.MS-PS1-1

What electron configuration matches an oxygen atom?

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

Tags

NGSS.HS-PS1-1

An orbital can at most hold how many electrons?

• 1 electron
• 2 electrons
• 3 electrons
• 4 electrons