Chemistry Semester 1 Final Review

Front

What is density?

Back

Density is the mass of an object divided by its volume, typically expressed in grams per milliliter (g/mL) or kilograms per cubic meter (kg/m³).

Front

How do you calculate density?

Back

Density = Mass / Volume. For example, if a wood sample has a mass of 40 grams and a volume of 80 mL, its density would be 0.5 g/mL.

Front

What is the chemical formula for dinitrogen pentoxide?

Back

N₂O₅.

Front

What is electronegativity?

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

Front

What type of bond is formed between atoms with different electronegativities?

Back

A polar covalent bond is formed when atoms with different electronegativities share electrons unequally.

Front

How many electrons does a neutral chromium (Cr) atom have?

Back

A neutral chromium atom has 24 electrons.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

How many valence electrons does magnesium (Mg) have?

Back

Magnesium has 2 valence electrons.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine how an atom can bond with other atoms, influencing the type of chemical bonds formed.

Front

What is a polar covalent bond?

Back

A polar covalent bond is a type of chemical bond where a pair of electrons is unequally shared between two atoms.