What can you say about a calcium atom by looking at the symbol 44/20 Ca?

2 answers:

8 0

The answer is d. a calcium atom has 20 protons and 24 neutrons. The 20 means the atomic number. The 44 means the atom mass which is the total of neutrons and protons.

Molodets [167]3 years ago

4 0

the symbol for Ca is

⁴⁴₂₀Ca

the subscript 20 is the atomic number. Atomic number is the number of protons in the atom. Atomic number is characteristic for the element

this means that Ca atomic number is 20 and it has 20 protons

the superscript 44 is mass number/ atomic mass. The mass of the atom is a sum of neutrons and protons.

neutrons + protons = 44

since protons = 20

neutrons = 44 - 20 = 24

number of protons - 20 and neutrons = 24

the correct answer is d. A calcium atom has 20 protons and 24 neutrons.

You might be interested in

3. Given the reaction:

sesenic [268]

Answer:

Attached

Explanation:

3 0

2 years ago

What are the chemical properties properties of spray paint?

melisa1 [442]

There is acetone, xylene, and toluene in spray paint

8 0

3 years ago

Read 2 more answers

1. A gas having the following composition is burnt under a boiler with 50% excess air.

jeka94

The composition of the stack gas are :

$CH_4$ = 0.8713

$C_3H_8$ = 0.0202

CO = 0.107

<h3 /><h3>What is a mole fraction?</h3>

The ratio of the number of moles of one component of a solution or other mixture to the total number of moles representing all of the components.

Assuming 100 g of the stack gas. Calculate the mass of each species in this sample according to their percentages.

Mass of $CH_4$ : 70% of 100 g = 70 g

Mass of $C_3H_8$ : 15% of 100 g = 15 g

Mass of CO : 15% of 100 g = 15 g

Now calculate the number of moles of each species:

Number of moles of $CH_4$ : $\frac{70 g}{16.04 g/mol}$ = 4.3 mole