Question

how many protons, electrons, and neutrons, respectively, does ⁸⁹sr²⁺ have?
38, 36, 51
38, 36, 89
38, 38, 51
36, 38, 53
question 16
1 pts
metals tend to lose electrons to become __________ while nonmetal gain electrons to become __________.
cations, anions
muons, gluons
protons, photons
hadrons, quarks

Explanation:

Step1: Determine number of protons

The atomic number of Sr (strontium) is 38. The number of protons is equal to the atomic number. So, number of protons = 38.

Step2: Determine number of electrons

The ion is $^{89}Sr^{2 + }$. A 2+ charge means the atom has lost 2 electrons. A neutral Sr atom has 38 electrons. So, number of electrons = 38 - 2=36.

Step3: Determine number of neutrons

The mass - number is 89. Mass number = number of protons+number of neutrons. So, number of neutrons = 89 - 38 = 51.

For the second question:
Metals tend to lose electrons to become cations, and non - metals gain electrons to become anions.

Answer:

First question: A. 38, 36, 51
Second question: A. cations, anions