Question

question 9
10 pts
element/ion atomic # # of protons # of neutrons # of electr
¹h
¹h+
question 10
10 pts
what happens if the number of protons in an atom change?
the number of neutrons will change

Explanation:

Step1: Recall atomic number concept

The atomic number of an element is equal to the number of protons. For hydrogen ($^1_1H$), the atomic number is 1, so the number of protons is 1. The mass - number is 1, and since mass - number=number of protons + number of neutrons, for $^1_1H$, number of neutrons = 1 - 1=0. In a neutral atom, the number of electrons is equal to the number of protons, so for $^1_1H$, number of electrons is 1.

Step2: Consider the ion $^1_1H^+$

The $^1_1H^+$ is a hydrogen ion formed by losing one electron. The atomic number and number of protons remain 1, number of neutrons is 0, and number of electrons is 0.

Step3: Answer question 10

The identity of an element is determined by the number of protons. If the number of protons in an atom changes, the element changes.

Answer:

Element/Ion	Atomic #	# of Protons	# of Neutrons	# of Electrons
$^1_1H^+$	1	1	0	0

Question 10: The element changes.