Chemistry Exam Review

Front

What are metalloids?

Back

Elements that have properties of both metals and nonmetals; they conduct electricity at high temperatures.

Front

What is the percent composition of oxygen in BaCrO₄?

Back

25.3%

Front

Which element has full orbitals, including a full valence shell?

Back

Argon.

Front

What is an Excess Reagent?

Back

The substance that is left over after a chemical reaction.

Front

What is a proton?

Back

A positively-charged subatomic particle with a relative mass of 1 amu, found in the atomic nucleus.

Front

What is the definition of a chemical reaction?

Back

A process in which substances (reactants) are transformed into different substances (products).

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it remains constant.

Front

What is an ionic bond?

Back

A chemical bond formed through the transfer of electrons from one atom to another, resulting in the attraction between oppositely charged ions.

Front

What is a covalent bond?

Back

A chemical bond formed when two atoms share one or more pairs of electrons.

Front

What is the periodic table?

Back

A tabular arrangement of elements organized by increasing atomic number, which shows periodic trends in properties.