Ch. 2 Chemical Basis of Life

Which of the following is NOT one of the major elements present in the human body:
A. Oxygen C. Iron
B. Carbon D. Hydrogen

Which of the following NOT a subatomic particle:
A. Proton C. Isotope
B. Electron D. Neutron

The total number of electrons in an atom equals the number of:
A. Neutrons in its nucleus C. Protons in its nucleus
B. Electrons in its nucleus D. Ions in its nucleus

An atom can be described a chemically inert if its outermost electron shell contains:
A. Three electrons C. Six electrons
B. Five electrons D. Eight electrons

Isotopes are atoms of elements that differ in their number of:
A. Protons C. Neutrons
B. Electrons D. Nuclei

Ionic bonds are chemical bonds formed by the:
A. Sharing of electrons between atoms
B. Transfer of electrons from one atom to another
C. Donation of protons from one atom to another
D. Acceptance of protons from one atom to another

Chemical bonds formed by the sharing of electrons are called:
A. Ionic C. Hydrogen
B. Covalent D. Electronic

A chemical reaction in which substances combine to form more complex substances is called:
A. Synthesis C. Exchange
B. Decomposition D. Reversible

True or False
Matter is a term used by chemists to describe all the materials or substances around
us.
True False

True or False
Atomic weight refers to the number of protons plus the number of neutrons in an
atom.
True False

True or False
Sodium chloride is an example of a covalent bond
True False

True or False
Hydrogen bonds form from an equal charge distribution within a molecule
True False

True or False
The digestion of food is an example of a decomposition reaction
True False

Name the following element

O

Name the following element

Ca

Name the following element

K

Name the following element

Na

Name the following element

Mg

Name the following element

Fe

Name the following element

Se