By counting in multiplication
The atomic number shows you the number of protons in the nucleus.
the amount of protons in an atoms nucli
two of the same numbers that are times together will equal that number. example 49 7 x 7 = 49 - no, that's not what the question is asking, everyone should know that. it's like numbers that are...
You can tell it's a composite number if it can only be multiplied by 1 and itself.
How to Divide Fractions and Mixed Numbers
How to Multiply Fractions by Mixed Numbers
How to Add and Subtract Mixed Numbers and Fractions
How to Add and Subtract Whole numbers and Fractions