Exam 1 Practice

The fundamental forms of matter are called

• electrons
• neutron
• cells
• protons
• elements

All of the following are common elements in living organisms except

• nitrogen
• carbon
• hydrogen
• neon
• oxygen

The nucleus of an atom is made up of

• protons

• neutrons

• electrons

• both protons and neutrons

• both protons and electrons

The atomic number of an element is based on

• the number of protons
• the number of neutrons
• the number of electrons
• the number of quarks
• the periodic table

An atom that differs from other atoms of the same element because it has additional neutrons is called a/an

• ion
• isotope
• mutation
• quark
• Brownian body

The mass number of an atom is equal to

• number of protons + number of electrons
• the number of neutrons only
• number of neutrons + number of electrons
• number of protons + number of neutrons
• none of the above

The innermost shell of an atom can hold up to __?__ electrons, while the outermost shell can hold up to __?__ electrons.

• 1, 7
• 2, 8
• 3, 9
• 1, 8
• 2, 9

An ion is an atom that

• carries a positive charge
• carries a negative charge
• carries either a positive or negative charge
• has an extra neutron
• none of the above

Covalent bonds are formed when

• electrons are shared
• protons are shared
• electrons are taken
• protons are taken
• none of the above

This refers to the separation of charge into distinct positive and negative regions in a molecule such as water.

• polarity
• ionization
• cohesion
• electronegativity
• the shell model