An atom has an average atomic mass of about 24.3 amu. what is the chemical
symbol for the atom? consult the periodic table.
o mg
o cr
o mn
o ca

Option (a) is the correct answer.

Explanation:

Atomic number is the sum of only total number of protons present in an element. Whereas mass number is the sum of total number of both protons and neutrons present in an element.

So, for an atom with atomic mass 24.3 amu must have an atomic number as 12.

And, according to the periodic table only magnesium is the element which has an atomic number 12. As every element has different atomic number.

Chemical symbol which represents magnesium is Mg.

Thus, we can  conclude that Mg is the chemical  symbol for the atom which has an average atomic mass of about 24.3 amu.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .