2025 Review

Front

How many bonds does magnesium (Mg) typically form?

Back

Magnesium typically forms 2 bonds.

Front

What is the electron configuration of sulfur (S)?

Back

The electron configuration of sulfur is 1s² 2s² 2p⁶ 3s² 3p⁴.

Front

What do isotopes of the same element differ in?

Back

Isotopes of the same element differ in mass numbers.

Front

What type of reaction is represented by the equation Na + Cl₂ → 2NaCl?

Back

This is an example of a synthesis reaction.

Front

What is the molar mass of magnesium chloride (MgCl₂)?

Back

The molar mass of magnesium chloride is 95.3 g/mol.

Front

Define a synthesis reaction.

Back

A synthesis reaction is a type of chemical reaction where two or more reactants combine to form a single product.

Front

What is the atomic number of magnesium (Mg)?

Back

The atomic number of magnesium is 12.

Front

Explain the significance of mass number in isotopes.

Back

The mass number is the total number of protons and neutrons in an atom's nucleus, which varies among isotopes of the same element.

Front

What is the chemical formula for magnesium chloride?

Back

The chemical formula for magnesium chloride is MgCl₂.

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, sum the atomic masses of all atoms in the compound's formula.