Question

Which TWO of the following options are TRUE about atomic mass and mass number?

A - The mass number is always the atomic mass rounded to the nearest whole number.
B - The atomic mass of an element is always the same no matter what the mass number of that particular atom is.
C - Mass number is always equal to the atomic number multiplied by 2.
D - The mass number is written on the periodic table.
E - Atomic mass is calculated by weighted atomic average using all the isotope data available.
F - Atomic mass and mass number are the same thing.
G - Mass number is equal to the sum of protons and electrons in an atom.

PLEASE ANSWER FAST

Answer 1

E - Atomic mass is calculated by weighted atomic average using all the isotope data available.

G - Mass number is equal to the sum of protons and electrons in an atom.

Step-by-step explanation:

Take an element

`\\ \bull\sf\longmapsto _(25)Mg^(12)`

• Mass no is 25 and atomic no is 12.