Chemistry Mid-term Exam 2024

Front

How many valence electrons does Bromine (Br) have?

Back

7

Front

The ______ of an element is the number of protons of each atom of that element.

Back

atomic number

Front

The bottom number in this isotope notation is

Back

the atomic number

Front

Isotopes are atoms with the same number of ____, but a different number of _______.

Back

Protons, Neutrons

Front

How many grams is 0.0825 moles of Silver?

Back

9.17 grams

Front

What is the definition of atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What are isotopes?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the mass number of an atom?

Back

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

Front

How do you calculate the number of moles from grams?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the molar mass of Silver (Ag)?

Back

The molar mass of Silver (Ag) is approximately 107.87 g/mol.