tiebreak8

The complete electron configuration of oxygen, that has an atomic number of 8, is __________.

• A. 1s² 2s² 2p⁶ 3s² 3p⁶

• B. 1s² 2s² 2p⁶ 3s² 3p²

• C. 1s² 2s² 2p⁴

• D. 1s² 2s² 2p⁶

what is the chemical symbol of sodium

• Sd

• So

• Na

• Nt

what is the chemical symbol of mercury

• Ag

• Hg

• Me

• Mr

what is the chemical symbol of tungsten

• Sg

• T

• Pb

• W

If an atom has 3 valence electrons, what charge will it have as an ion?

• +3

• -3

• +5

• -5

If an atom loses 2 electrons, what charge will it have as an ion?

• +2

• -2

• 0

• 8

solve (2x -3)² +1 =9

solve −2k² = −162

if an imaginary i is multiplied to another i the answer is