2024 Chemistry Fall Final Exam Part II

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 element has 11 protons?

Back

Sodium (Na) has 11 protons.

Front

What do nonmetals tend to do with electrons?

Back

Nonmetals tend to gain electrons.

Front

What is a Single Replacement reaction?

Back

A Single Replacement reaction is a type of chemical reaction where one element replaces another in a compound.

Front

What is the name of the compound SiCl4?

Back

The name of SiCl4 is silicon tetrachloride.

Front

What is the difference between a metal and a nonmetal?

Back

Metals tend to lose electrons and conduct electricity, while nonmetals tend to gain electrons and are poor conductors.

Front

What is a chemical formula?

Back

A chemical formula is a way of expressing the composition of a compound using symbols for the elements and numbers to indicate the ratio of atoms.

Front

What is the significance of neutrons in an atom?

Back

Neutrons contribute to the atomic mass and stability of the nucleus but do not affect the chemical properties of the element.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together.

Front

What is the role of electrons in chemical bonding?

Back

Electrons are involved in forming chemical bonds between atoms, either by being shared (covalent bonds) or transferred (ionic bonds).