Question

1.what element is shown in this bohr model?
a. helium
b. argon
c. sulfur
d. calcium

1. how many energy levels are shown in the above bohr model?

a. 3
b. 4
c. 18
d. 22

1. what is the maximum number of electrons in the second energy level of every atom?

a. 1
b. 3
c. 8
d. 2

1. which element is in group 16 period 4?

a. selenium
b. beryllium
c. tellurium
d. sulfur

1. which pieces of information could you use to determine the number of neutrons?

a. element name
b. element symbol
c. atomic number

Explanation:

Step1: Identify element by protons

The atomic number is equal to the number of protons. Here there are 18 protons, and argon has an atomic number of 18.

Step2: Count energy - levels

Count the concentric circles in the Bohr - model, there are 3.

Step3: Recall electron - capacity rule

The maximum number of electrons in the second energy level of an atom is 8, based on the 2n² rule (n = 2 gives 2×2²=8).

Step4: Locate element on periodic table

Selenium is in Group 16 Period 4 of the periodic table.

Step5: Determine neutron - number info

To find the number of neutrons, we usually need the mass number and the atomic number. But among the given options, the atomic number is related as mass number - atomic number = number of neutrons.

Answer:

1. B. Argon
2. A. 3
3. C. 8
4. A. Selenium
5. C. Atomic number