All categories

3 years ago

In the nucleus of an Adam there are 18 protons and 20 neutrons what are the atomic number and mass number of this isotope

Chemistry

2 answers:

yKpoI14uk [10]3 years ago

6 0

Atomic number = 18 (Number of protons)
Mass number = 18 + 20 (Number of protons + neutrons)

abruzzese [7]3 years ago

3 0

Answer:

The atomic number this isotope is 18.

The atomic mass this isotope is 38.

Explanation:

Atomic number(Z) = Total numbers of protons

Mass number (A) = Total number of protons(Z) + Total number of neutrons(N)

A = Z + N

We have :

Number of protons in a nucleus of a given atom of an isotope, Z= 18

Number of neutrons in a nucleus of a given atom of an isotope, N= 20

A = Z + N = 18 + 20 = 38

The atomic number this isotope is 18.

The mass number this isotope is 38.

You might be interested in

What is the change in boiling point for a 0.615m solution of Mgl2 in water?

ivanzaharov [21]

Answer : The change in boiling point is, $0.94^oC$

Explanation :

Formula used :

$\Delta T_b=i\times K_f\times m$

where,

$\Delta T_b$ = change in boiling point = ?

i = Van't Hoff factor = 3 (for MgI₂ electrolyte)

$K_f$ = boiling point constant for water = $0.51^oC/m$

m = molality = 0.615 m

Now put all the given values in this formula, we get

$\Delta T_b=3\times (0.51^oC/m)\times 0.615m$

$\Delta T_b=0.94^oC$

Therefore, the change in boiling point is, $0.94^oC$

4 0

3 years ago

Group 17 is called the halogen family, and the group to its right is called the noble gases. How are these elements alike and ho

Vesnalui [34]

Explanation:

The halogen family and noble gases are similar in just one particular way, they are groups of non-metals. All members of these two groups are categorized as non-metals.

Here are some of the differences between them;

Halogens have 7 electrons in their outermost shell whereas noble gases have 8 electrons in theirs.
Halogens are highly reactive elements, noble gases are non-reactive.
Halogens are made up of electronegative elements where as noble gases are neither electropositive nor electronegative.

4 0

2 years ago

The state of water is determined solely by the conditions of _____.

bagirrra123 [75]

Gas !!
-
-
Gas
Gas
Gas

4 0

3 years ago

Read 2 more answers

How are new kinds of matter formed in a chemial change?

shtirl [24]

Because the reactants react with each other and chemically react to produce a different product like with fire when it reacts with the wood it burns and the product left behind is a new different substance from the reactants in this case the product is ash

7 0

3 years ago

Read 2 more answers

Consider the following equilibrium: CO2(g) + C(graphite) 2CO(g); ΔH = 172.5 kJ The equilibrium constant for this reaction will

bezimeni [28]

Answer: Option (B) is the correct answer.

Explanation:

As the given reaction is as follows.

$CO_{2}(g) + C(graphite) \rightarrow 2CO(g)$