PHY SCI FINAL REVIEW

Fe(s) + CuSO₄(aq) → FeSO₄(aq) + Cu(s) This chemical equation represents a ____________ reaction.

• synthesis
• decomposition
• neutralization
• single replacement

One radioactive isotope of calcium has an atomic mass number of 47. How many neutrons are in the calcium-47 nucleus?

• 17

• 20

• 27

• 47

Tags

NGSS.MS-PS1-1

The charge of an atom is

• negative

• neutral

• positive

• dependent upon the atomic number

Which type of element loses an electron to become an ion?

• gas

• metal

• nonmetal

• semimetal

Which of the atoms shown has an atomic number of 4?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

The elements from this section of the periodic table all belong to the same

• family

• group

• period

• valence

Based on the table, determine the identity of the unknown metal. Density Formula D=M/V. Roni picks up a sample of a silver, cylindrical-shaped piece of an unknown metal and is told by her teacher to find the identity of it. She decides to measure its mass by using an analytical balance. The mass is found to be 42.5g. She then puts the metal in a graduated cylinder and finds the volume to be 5.8ml.

• Aluminum

• Magnesium

• Nickel

• Tin

Which element is an example of a metalloid?

• gold

• helium

• iron

• silicon

Based on the table from Ms. Richards, what element from Earth’s crust did Ms. Richards give to Sanjay?

Aluminum 2.698 g/mL Calcium 1.54 g/mL Iron 7.8738 g/mL Silicon 2.3296 g/mL

• iron

• calcium

• aluminum

• silicon

Tags

NGSS.MS-ESS3-1

Which equation correctly represents the alpha decay of polonium-214?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-8