EOCA Quiz

Which particle in an atom has a negative charge and is found in the electron cloud?

• Proton

• Neutron

• Electron

• Nucleus

What determines the atomic number of an element?

• Number of neutrons

• Number of protons

• Number of electrons

• Combined number of protons and neutrons

Atoms of the same element with different numbers of neutrons are called:

• Isotones

• Ions

• Isotopes

• Isobars

Tags

NGSS.HS-PS1-8

Which type of nuclear decay results in the emission of an electron from the nucleus?

• Alpha decay

• Beta decay

• Gamma decay

• Positron emission

Tags

NGSS.HS-PS1-8

If a radioactive sample has a half-life of 10 days, how much of the original sample will remain after 20 days?

• One-fourth

• One-third

• One-half

• Three-fourths

Tags

NGSS.HS-PS1-8

The medical use of radioactive isotopes for imaging is called:

• Radiation therapy

• Nuclear fission

• Nuclear fusion

• Nuclear medicine

What determines the reactivity of an element?

• Number of neutrons

• Atomic mass

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In the periodic table, atomic radius generally:

• Increases down a group and across a period

• Decreases down a group and across a period

• Increases down a group and decreases across a period

• Decreases down a group and increases across a period

What type of bond forms when electrons are transferred from a metal to a nonmetal?

• Covalent bond

• Ionic bond

• Hydrogen bond

• Metallic bond

Tags

NGSS.HS-PS1-1

Which is evidence of a chemical reaction?

• Melting ice

• Dissolving sugar

• Formation of a precipitate

• Boiling water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5