Key Terms Module 2 Flashcards Preview

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Flashcards in Key Terms Module 2 Deck (12):
1

Isotope

Atoms of the same element with different numbers of neutrons and different masses

2

Mass number

Number of protons + number of neutrons

3

Atomic number

Number of protons

4

Cation

An atom with fewer electrons than protons
Positive ion

5

Anions

An atom with more electrons than protons
Negative ion

6

Relative isotopic mass

The mass of an isotope relative to 1/12th of the mass of an atom of carbon-12

7

Relative atomic mass

The weighted mean mass of an atom of an element relative to 1/12th of the mass of an atom of carbon-12.

8

Polyatomic ions

Where an ion contains atoms of more than one element bonded together

9

One mole

The amount of a substance that contains 6.02x10^23 particles

10

Molar mass

The mass in grams for each mole of the substance

11

Molecular formula

The number of atoms of each element in a molecule

12

Covalent bonding

The strong electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms