Matter Test I

Which statement about subatomic particles is NOT true?

• Protons and neutrons have almost the same mass.
• Protons and electrons have opposite charges.
• Protons and neutrons have the same charge.
• Unlike protons and , neutrons have no charge

Which of the following is unique for any given element? (In other words, it is different for each element, like DNA or a fingerprint.)

• the number of protons
• the charge of electrons
• the mass of a neutron
• the number of neutrons

The atomic number of an element equals the number of

• protons only.
• neutrons only.
• protons and neutrons combined.
• electrons only.

The atomic mass equals the number of

• protons only.
• neutrons only.
• protons and neutrons combined.
• electrons only.

What is the atomic number for fluorine?

• 9
• 19
• 36
• can't be determined

What is the atomic mass for fluorine?

• 9
• 10
• 19
• can't be determined

How many protons does fluorine have?

• 9
• 10
• 19
• can't be determined

How many neutrons does fluorine have?

• 9
• 10
• 19
• can't be determined

For fluorine, how many electrons are located on the LAST energy level (valence electrons)?

• 1
• 7
• 8
• 10

How is the periodic table arranged?

• by increasing atomic number
• by atomic mass
• by the number of neutrons
• by state of matter