chem 2.0 review

How many bonds can a carbon atom form?

• 1

• 2

• 3

• 4

Which shows the correct order of the following atomic orbitals?

• f orbital, d orbital, p orbital, s orbital

• p orbital, f orbital, s orbital, d orbital

• s orbital, d orbital, f orbital, p orbital

• s orbital, p orbital, d orbital, f orbital

Which of the following compounds have ions?

I. NaCl

II. Fe2O3

III. Cl2O

IV. K2S

V. CO2

• I, II and III

• I, II, and IV

• II, III, and V

• III, IV, and V

Amedeo Avogadro is an Italian scientist who used a constant number to represent the mole of a substance. Which of these represents the number of units in one mole of any substance?

• 3.01 x 10^23

• 3.01 x 10^24

• 6.02 x 10^23

• 6.02 x 10^24

How will you be able to differentiate table salt (NaCl) from table sugar (C12H22O11)?

• Table salt melts faster

• Table salt dissolves in water.

• Table salt is colored white and has a crystalline form.

• Once it is dissolved in water, table salt conducts electricity.

Which states that “it is impossible to determine accurately both the momentum and the position of an electron at the same time?”

• Hund’s Rule

• Aufbau Principle

• Heisenberg Uncertainty Principle

• Pauli’s Exclusion Principle

Which concept shows a comparison between the mass of each element in a compound and the total mass of the compound multiplied by 100 percent?

• Formula mass

• Empirical formula

• Molecular formula

• . Percentage composition

What is the electron configuration of Calcium (Z = 20)?

• 1s2, 2s2, 2p3

• 1s2, 2s2, 2p6, 3s2, 3p4

• 1s2, 2s2, 2p6, 3s2, 3p6, 4s1

• 1s2, 2s2, 2p6, 3s2, 3p6, 4s2

What is the molecular formula of ethene gas?

• CH4

• CH3CH3

• H2C = CH2

• CH3CH2CH3

What kind of a sigma bond overlap is present in hydrogen fluoride, H–F?

• s – s overlap

• p – p overlap

• s – p overlap

• all of the otions