30
Mean
no
1(one) is a number. It represents a single entity.
one
The GCF refers to integers, not fractions.
An "expression" is anything that can be calculated to get a number, in other words, anything that represents a number, so that includes the numbers themselves.
A single, short vertical stroke represents 1.
The square root of 6 lies between 2 and 3.
The mass number in helium represents the total number of protons and neutrons in the nucleus of a helium atom. It is used to determine the mass of the atom and differentiate between different isotopes of helium.
Bond order is the number of bonds. For a diatomic molecule e.g O2 has bond order two because O=O is a double bond.
The numbers between 20 and -15 include all real numbers greater than -15 and less than 20. This range encompasses a wide variety of integers, fractions, and decimals, such as -10, 0, 5, 15, and 19. There is no single number that represents "the number" between these two values; rather, there are infinitely many.
It is not. In cultures other than yours it is written differently. However, it is often a single line representing the single entity that the number represents.