Question

Please help!!

sodium magnesium
11 12
stion
Na Mg
22.990 24.305
potassium calcium scandium
20
19
21
K
Ca Sc
39 098
rubidium
37
Rb
85.468
40.078 44966
strontium
Sr
87.62
yttrium
39
Y
88.906

Part 1: Name two elements that have the same properties as calcium (Ca). (4 points)

Part 2: Determine the number of protons, electrons, and neutrons present in an atom of sodium (Na). Explain how you determined your answer using complete
sentences. (6 points)

Answer 1

The two elements that have the same properties as calcium are strontium and barium. An atom of sodium has 11 protons, 11 electrons, and 12 neutrons.

Step-by-step explanation:

Part 1:

The two elements that have the same properties as calcium (Ca) are strontium (Sr) and barium (Ba). These elements belong to the same group as calcium on the periodic table and have similar chemical behaviors and properties.

Part 2:

For an atom of sodium (Na), the number of protons, electrons, and neutrons can be determined using the information provided. Sodium has an atomic number of 11, which tells us that it has 11 protons. Since sodium is a neutral atom, it also has 11 electrons.

To find the number of neutrons, we subtract the atomic number from the mass number. Sodium has a mass number of 22.990, so subtracting 11 (the atomic number) from 22.990 gives us 11.990.

However, since neutrons are always whole numbers, the number of neutrons in an atom of sodium is 12.