Chemistry Final Exam Review

Front

What is a significant figure?

Back

A significant figure is a digit in a number that contributes to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Front

How many significant figures are in the number 2.00?

Back

3 significant figures.

Front

What is the rule for determining significant figures in a measurement?

Back

Non-zero digits are always significant. Any zeros between significant digits are significant. Leading zeros are not significant. Trailing zeros in a decimal number are significant.

Front

What is the maximum number of electrons that can occupy the d sublevel?

Back

10 electrons.

Front

What is the electron configuration for Zinc?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰.

Front

How do you calculate the number of neutrons in an atom?

Back

Subtract the atomic number (number of protons) from the mass number (total number of protons and neutrons).

Front

What is the mass number of an atom with 4 protons and 5 neutrons?

Back

9 (4 protons + 5 neutrons = 9).

Front

What is the electron configuration for an element with 30 electrons?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ (This is Zinc).

Front

What is the importance of safety rules in a science classroom?

Back

Safety rules are essential to prevent accidents and ensure a safe learning environment during experiments.

Front

What is the definition of an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means and is made up of atoms with the same number of protons.