Question

Barium is a metal, and Chlorine is a nonmetal. They will form a covalent bond.(1 point)
Responses

True
True

False
False
Question 16
(2 points)
Responses

There are more Oxygen atoms on the left side than on the right side
There are more Oxygen atoms on the left side than on the right side

There are only one magnesium on both sides
There are only one magnesium on both sides

This equation follow the law of conservation of atoms
This equation follow the law of conservation of atoms

This equation does not follow the law conservation of atoms
This equation does not follow the law conservation of atoms
Question 17
Methane CH4 is a gas that is found in small quantities in Earth's atmosphere. Choose 2 the correct answers about Methane.(4 points)
Responses

methane is a covalent compound
methane is a covalent compound

Methane is a nonpolar compound
Methane is a nonpolar compound

Methane is a polar compound
Methane is a polar compound

Methane is an ionic compound
Methane is an ionic compound
Question 18


Using the Molecular Structure of Formaldehyde, chose 2 answers about the molecular structure,

(1 point)
Responses

It has 2 double bonds, and 2 single bonds
It has 2 double bonds, and 2 single bonds

Carbon has 4 valence electrons, Hydrogen has 1 valence electron, Oxygen has 6 valence electrons
Carbon has 4 valence electrons, Hydrogen has 1 valence electron, Oxygen has 6 valence electrons

The structure is incorrect
The structure is incorrect

Formaldehyde contains 1 double bond and 2 single bonds
Formaldehyde contains 1 double bond and 2 single bonds
Question 19


Choose 2 correct answers:

(4 points)
Responses

Carbon has 4 valence electrons, Oxygen has 2 valence electrons, Hydrogen has 1 valence electron
Carbon has 4 valence electrons, Oxygen has 2 valence electrons, Hydrogen has 1 valence electron

A carbon has 4 valence electrons, oxygen has six, and each hydrogen has one
A carbon has 4 valence electrons, oxygen has six, and each hydrogen has one

Carbon shares 4 electrons to oxygen to give oxygen 8 valence electrons
Carbon shares 4 electrons to oxygen to give oxygen 8 valence electrons

Carbon shares 2 electrons with oxygen to give oxygen eight valence electrons

Answer 1

Q15: False — Ba (metal) + Cl (nonmetal) form an ionic bond (BaCl2), not covalent.

Q16:
- There are more Oxygen atoms on the left side than on the right side.
- This equation does not follow the law conservation of atoms.
(These apply if the unbalanced equation is Mg + O2 → MgO.)

Q17 (choose 2):
- methane is a covalent compound
- Methane is a nonpolar compound

Q18 (choose 2):
- Carbon has 4 valence electrons, Hydrogen has 1 valence electron, Oxygen has 6 valence electrons
- Formaldehyde contains 1 double bond and 2 single bonds

Q19 (choose 2):
- A carbon has 4 valence electrons, oxygen has six, and each hydrogen has one
- Carbon shares 4 electrons to oxygen to give oxygen 8 valence electrons (as in a C=O double bond)