PhySci F24 Chemistry Mid Term

Front

What type of chemical reaction occurs when beryllium (Be) combines with oxygen (O2) to form beryllium oxide (BeO)?

Back

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

Front

What is the mass number of an atom with 29 protons, 29 electrons, and 35 neutrons?

Back

Mass number = Protons + Neutrons = 29 + 35 = 64.

Front

Which type of chemical bond accounts for the high electrical conductivity in a bar of pure silver (Ag)?

Back

Metallic bond: A bond formed by the attraction between positively charged metal ions and the electrons in a metal.

Front

Atoms of which two elements will form an ionic bond?

Back

Magnesium (Mg) and Chlorine (Cl): An ionic bond forms when electrons are transferred from one atom to another.

Front

Which of the following has a full valence shell? Oxygen, Neon, Barium, Carbon?

Back

Neon: It has a full valence shell with 8 electrons, making it stable.

Front

Define a chemical reaction.

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Front

What is a valence electron?

Back

An electron in the outermost shell of an atom that can participate in forming chemical bonds.

Front

What is the significance of the octet rule in chemistry?

Back

Atoms tend to bond in such a way that they have eight electrons in their valence shell, achieving stability.

Front

What is a decomposition reaction?

Back

A type of chemical reaction where one compound breaks down into two or more simpler products.