Question 5

Question

Two of most unique elements on the periodic table are hydrogen and helium. What makes them so unique and removed from the other groups on the periodic table?

a
Unlike all other elements, hydrogen and helium are gases
b
Unlike all other elements, hydrogen and helium are not considered metals
c
Unlike all other elements, hydrogen and helium only have a maximum of 2 valence electrons
d
Unlike all other elements, hydrogen and helium have very limited properties
Question 6
The periodic table groups elements into which of the following three categories?

a
Solids, Liquids, Gases
b
Heavy, Light, Medium
c
Dense, Expanded, Compressed
d
Metals, Nonmetals, Metalloids
Question 7
A bond between sodium (Na) and chlorine (Cl) is what type of bond?

a
ionic
b
covalent
c
hydrogen
d
metallic
Question 8
Which of the following must happen in order for atoms to bond either ionically or covalently with one another?

a
The valence shells of all atoms must be filled after the bonding occurs
b
The chemical properties of the atoms must be satisfied
c
The ions must have different charges
d
The resulting compound must follow ionic naming conventions

Answer 1

Here are the answers to the questions based on your provided options:

Question 5
Answer: c
Unlike all other elements, hydrogen and helium only have a maximum of 2 valence electrons.

• Hydrogen has 1 electron and can hold 2 in total, while helium has 2 electrons, making them unique as they are both at the beginning of the periodic table and possess a full outer shell with a maximum of 2 electrons.

Question 6
Answer: d
Metals, Nonmetals, Metalloids.

• The periodic table classifies elements mainly into these categories, based on their properties.

Question 7
Answer: a
ionic.

• A bond between sodium (Na) and chlorine (Cl) is an ionic bond, where sodium donates an electron to chlorine, resulting in the formation of Na+ and Cl- ions.

Question 8
Answer: a
The valence shells of all atoms must be filled after the bonding occurs.

• For atoms to bond (either ionically or covalently), they typically seek to achieve full valence shells, which leads to greater stability in molecules.