Question

name: shylo stuart
teacher:
date:
q1 chemistry: u2l1 the atom & subatomic particles
prepwork part 1: the atom & subatomic particle practice

1. what is the overall charge of an ion that has 15 protons, 18 electrons, and 17 neutrons?

a. +1 b. -1 c. +3 d. -3

1. what is the mass number of the ion in q1?

a. 32 b. 33 c. 35 d. 50

1. what is the overall charge of an ion that has 6 protons, 8 electrons, and 8 neutrons?

a. +2 b. -2 c. 0 d. -1

1. what is the mass number of the ion in q3?

a. 12 b. 14 c. 16 d. 22

1. explain how to find the charge of an ion.

1. explain how to find the mass number of an atom or ion.

Explanation:

Question 1

Step1: Recall charge formula

Charge = protons - electrons. Protons = 15, electrons = 18.
$Charge = 15 - 18$

Step2: Calculate charge

$15 - 18 = -3$? Wait, no, wait: Wait, 15 protons (positive charge) and 18 electrons (negative charge). So net charge is (15+1) + (18 -1) = 15 - 18 = -3? But wait the options are a. +1, b. -1, c. +3, d. -3. Wait, maybe I miscalculated. Wait, 15 protons, 18 electrons. So charge is protons - electrons = 15 - 18 = -3? But let's check again. Protons have +1, electrons -1. So total charge: 15(+1) + 18(-1) = 15 - 18 = -3. So option d? Wait but maybe the question has a typo? Wait no, let's check the options again. The options for Q1 are a. +1, b. -1, c. +3, d. -3. So 15 - 18 = -3, so d.

Step1: Recall mass number formula

Mass number = protons + neutrons. From Q1, protons = 15, neutrons = 17.
$Mass\ number = 15 + 17$

Step2: Calculate mass number

$15 + 17 = 32$? Wait, 15 + 17 is 32? But the options are a. 32, b. 33, c. 35, d. 50. Wait 15 + 17 = 32, so a.

Step1: Recall charge formula

Charge = protons - electrons. Protons = 6, electrons = 8.
$Charge = 6 - 8$

Step2: Calculate charge

$6 - 8 = -2$

Answer:

d. -3

Question 2