Question

using the periodic table, complete the table to describe each atom. type in your answers.
a 20
b 40
c ca
d 10
e 9
f
done

Explanation:

Step1: Identify element from atomic number

Atomic number \(Z = 20\) corresponds to Calcium (\(Ca\)).

Step2: Calculate mass number

Mass number \(A=\) number of protons + number of neutrons. For \(Ca\), if number of protons \(Z = 20\) and number of neutrons \(n = 20\), then \(A=Z + n=20 + 20=40\).

Step3: Analyze for other elements

For \(D\): Atomic number \(Z = 9\) (Fluorine, \(F\)), mass number \(A=\) number of protons + number of neutrons. If number of protons \(Z = 9\) and number of neutrons \(n = 10\), \(A=9 + 10 = 19\).
For \(E\): Atomic number \(Z = 9\) (Fluorine, \(F\)).
For \(F\): Let's assume it's an element. If we consider the pattern, for example, if we assume it's an element with atomic number \(Z = 19\) (Potassium, \(K\)), mass number if protons \(Z = 19\) and if we assume similar neutron - proton ratio as \(Ca\) (approximate), say neutrons \(n = 20\), mass number \(A=19+20 = 39\).

Answer:

A: \(Ca\) (Calcium)
B: \(40\) (mass number of \(Ca\))
C: \(Ca\) (Calcium)
D: \(19\) (mass number of \(F\) if \(Z = 9,n = 10\))
E: \(F\) (Fluorine)
F: \(K\) (Potassium) and mass number \(39\) (assuming \(Z = 19,n = 20\))