P.S. FINAL EXAM PRACTICE TEST CHEMISTRY FALL 24

Front

What type of reaction is Na2O(s) + H2O(l) => NaOH(aq)?

Back

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

Front

E is the ___ in an atom.

Back

Neutron: A subatomic particle found in the nucleus of an atom, with no electric charge.

Front

The number on the periodic table that tells us the number of protons and electrons in atoms is the ___ number.

Back

Atomic number: The number of protons in the nucleus of an atom, which also equals the number of electrons in a neutral atom.

Front

Covalent compounds form between ___ elements.

Back

Nonmetal elements: Covalent bonds are formed when two nonmetals share electrons.

Front

Elements in the same group on the periodic table have ___ properties because their atoms have ___ number(s) of valence electrons.

Back

Similar properties / the same number of valence electrons: Elements in the same group have similar chemical properties due to having the same number of valence electrons.

Front

What is the definition of a covalent bond?

Back

A covalent bond is a chemical bond formed by the sharing of electron pairs between atoms.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons.

Front

What is the significance of the atomic mass unit (amu)?

Back

The atomic mass unit is a standard unit of mass that quantifies mass on an atomic or molecular scale, defined as one twelfth of the mass of a carbon-12 atom.

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.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.