Section 1

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Nucleus

Front

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Last updated

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Date created

Mar 1, 2020

Cards (22)

Section 1

(22 cards)

Nucleus

Front

The central core in atoms composed of positively charged protons and neutral neutrons

Back

Proton

Front

Positively charged subatomic particle that makes up the nucleus of an atom

Back

Aqueous Solution

Front

A solution where the solvent is water

Back

Octet Rule

Front

Rule that atoms tend to completely fill their outermost energy level

Back

Atomic Mass

Front

The sum of the masses of protons and neutrons of an atom; electrons aren't necessarily taken into account because they are relatively weightless

Back

Anion

Front

A negatively charged ion that has more electrons than protons

Back

Atomic Number

Front

The number of protons in an atom which defines the element

Back

Neutron

Front

Subatomic particle that has no charge and makes up the nucleus of an atom

Back

Mole

Front

Unit of something -weight of substance in grams of atomic masses -6.02x10^23 particles in a mole (Avogadro's Number) -22.4 Liters of gas at STP (0°C or 273K @ 1atm or 101kPa)

Back

Compound

Front

When a molecule contains more than one element

Back

Cation

Front

A positively charged ion that has more protons than electrons

Back

Element

Front

Any substance that cannot be broken down to any other substance by ordinary chemical means

Back

Molecule

Front

Group of atoms held together by energy in a stable association (chemical bond)

Back

Electron

Front

Negatively charged subatomic particles located in orbitals around the nucleus of an atom

Back

Electronegativity

Front

The tendency of an ion to take an electron -increases up periodic table and to the right -different electronegativity creates polar covalent bonds

Back

Atom

Front

The smallest unit of an element that contains all the characteristics of that atom; the building blocks of matter

Back

Matter

Front

Any substance that has mass and occupies space

Back

Isotope

Front

Atoms of an element with different number of neutrons; these have same chemical properties but different masses and may be radioactive

Back

Ion

Front

Atoms in which the number of electrons is not the same as the number of protons and are either positive or negative

Back

Covalent Bond

Front

Chemical bond forming when two atoms share one or more pairs of valence electrons -single, double or triple bonds (increase in strength)

Back

Valence Electrons

Front

Electrons in the outermost energy level of an atom; the key to chemical bonds

Back

Ionic Bond

Front

Chemical bond forming between oppositely charged ions (cation + anion)

Back