THIRD WRITTEN TEST IN SCIENCE 8

What is an atom?

• A. A particle with no mass

• B. A positively charged particle.

• C. A negatively charged particle.

• D. The most basic unit of an element.

What is subatomic particle with a negative charge?

• A. Ions

• B. Electrons

• C. Neutrons

• D. Protons

What is the atomic number of hydrogen (H)?

• A. 1

• B. 2

• C. 4

• D. 10

What is an atomic number?

• A. Number of protons in an atom

• B. Number of electrons in an atom

• C. Number of neutrons in an atom

• D. Number of protons and electrons in an atom

What is shown above the element symbol on the periodic table?

• A. Atomic mass

• B. Atomic number

• C. Element name

• D. Number of isotopes

Which of the following are the subatomic particles found in the nucleus of an atom?

• A. Protons only

• B. Proton and neutron

• C. Electron and neutron

• D. Electron and proton

What would be the result if the number of electrons and protons in a charged atom are not equal?

• A. Ion

• B. Electron

• C. Isotope

• D. Proton

What is a subatomic particle with a positive charge that is in the nucleus of an atom?

• A. Electron

• B. Neutron

• C. Proton

• D. Valence electron

Which of the following are the three subatomic principles that make up an atom?

• A. Proton, neutron, and isotope

• B. Proton, isotope, and electron

• C. Proton, electron, and isotope

• D. Proton, neutron, and electron

What would be the result if the number of protons is added with the number of neutrons?

• A. Ion charge

• B. Mass number

• C. Atomic mass

• D. Atomic number