Question

warm up: its all about the atom
fill in the following chart for your element:
symbol: y
atomic number
atomic mass
mass number

of protons

of electrons

of neutrons

Explanation:

Step1: Recall Element Y (Yttrium)

Element with symbol Y is Yttrium. From periodic table, atomic number of Yttrium is 39.

Step2: Determine Atomic Mass

Atomic mass of Yttrium is approximately 88.91 (or 89 for simplicity).

Step3: Calculate Mass Number

Mass number is sum of protons and neutrons, approximately equal to atomic mass (rounded). So mass number ≈ 89.

Step4: Find Number of Protons

Atomic number = number of protons, so protons = 39.

Step5: Find Number of Electrons

In neutral atom, electrons = protons, so electrons = 39.

Step6: Calculate Number of Neutrons

Neutrons = mass number - atomic number = 89 - 39 = 50.

Answer:

Symbol	Y
Atomic Mass	88.91 (or 89)
Mass Number	89
# of Protons	39
# of Electrons	39
# of Neutrons	50