Physical Science S1 Final Exam

Front

In the periodic table, elements are arranged by:

Back

Atomic number.

Front

What type of decay is represented by the equation 238U -> 234Th + 4He?

Back

Alpha decay.

Front

Which family/group of elements has a full set of valence electrons and is completely nonreactive?

Back

Noble Gases.

Front

Ionic bonds occur between a __________ and non-metal.

Back

Metal.

Front

An isotope is the same element with a different number of...?

Back

Neutrons.

Front

What is the definition of an element?

Back

A substance that cannot be broken down into simpler substances by chemical means.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is a chemical bond?

Back

A lasting attraction between atoms that enables the formation of chemical compounds.

Front

What are valence electrons?

Back

Electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

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

Back

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