Fall Semester Exam Review (test grade)

Front

What is the electron configuration for an atom with 8 electrons?

Back

1s² 2s² 2p⁴.

Front

How many total electrons are in an atom with the configuration 1s² 2s² 2p⁴?

Back

8 electrons.

Front

What is the process of rounding a number to significant figures?

Back

Rounding involves adjusting a number to a specified number of digits that carry meaning contributing to its precision.

Front

Round the number 1047.78 to three significant figures.

Back

1050.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

If an atom has 10 protons and 15 neutrons, what is its mass number?

Back

25.

Front

What are transition elements?

Back

Transition elements are the metallic elements found in groups 3-12 of the periodic table, known for their ability to form variable oxidation states.

Front

Which area on the periodic table represents the electrons in the 'd' sublevel?

Back

Transition elements.

Front

What does it mean for a measurement to be precise?

Back

Precision refers to the consistency of repeated measurements, regardless of their closeness to the true value.

Front

If a dart player consistently hits the same spot but not the bullseye, how would you describe their skills?

Back

Precise.