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3 years ago

How do you determine the number of protons in an element

Chemistry

1 answer:

QveST [7]3 years ago

3 0

Answer:

You determine the number of protons by its atomic number, just like electrons.

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Assuming the substance is one of those listed in the table presented in this lesson, what is the identity of the substance?

zepelin [54]

The identity of the substance is Iron.

<h3>Properties of Iron</h3><h3>Chemical properties</h3>

The element iron has the atomic number 26 and the symbol Fe
Electronic configuration of Fe is [AR] 3d6 4s2
The atomic weight of Iron is 55.847
The element iron belong to the group VIII of the periodic table

It is the fourth most prevalent element in the crust of the world
It is a highly reactive element as it gets rusted readily in the moisture of air

<h3>Physical properties</h3>

It is a heavy metal in the first transition series
The color of iron is silvery grey
High malleability and ductility
It has a strong electrical conductivity.

Learn more about periodic table on

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8 0

1 year ago

Read 2 more answers

Which atom in the ground state has the same electron configuration as a calcium ion, Ca2+, in the ground state?(1) Ar(2) K(3) Mg

Irina-Kira [14]

atoms are made of 3 types of subatomic particles; electrons, protons and neutrons

atomic number is the number of protons. atomic number is characteristic for the element. In ground state atoms, the number of electrons and protons are the same.

the electronic configuration of Ca in the ground state is

Ca - 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

when Ca loses its 2 valence electrons, it becomes positively charged and the electronic configuration becomes

Ca - 1s² 2s² 2p⁶ 3s² 3p⁶

number of electrons in Ca²⁺ is 18

the atom in the ground state would have the same number of electrons and protons. Therefore number of protons are 18. then the atomic number of the element is 18

the atom having an atomic number of 18 is Ar.

the answer is 1) Ar

7 0

3 years ago

Read 2 more answers

Lead ions and magnesium ions both have a charge of 2+. predict the ionic equation for this reaction.

FinnZ [79.3K]

Answer:
PbMg

Explanation:
Because they both have a charge of 2+, they can be reduced and cancel each other out because 2 and 2 can be reduced to 1

4 0

2 years ago

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