Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the charge of a proton?

Back

Positive

Front

What is the mass percent of an element in a compound?

Back

The mass percent of an element in a compound is the mass of that element divided by the total mass of the compound, multiplied by 100.

Front

What is the chemical formula of lithium phosphate?

Back

Li₃PO₄

Front

Which element in the 2nd period has the largest ionization energy?

Back

Fluorine

Front

What is the definition of ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom in its gaseous state.

Front

What is the difference between an ionic bond and a covalent bond?

Back

An ionic bond is formed by the transfer of electrons from one atom to another, while a covalent bond is formed by the sharing of electrons between atoms.

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express amounts of a chemical substance, defined as exactly 6.022 x 10²³ particles (atoms, molecules, etc.).

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.