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Section 1

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activation energy

Front

1 / 31

Chemistry Science

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Date created

Mar 1, 2020

Cards (31)

Section 1

(31 cards)

activation energy

Front

the minimum amount of energy required to start a chemical reaction

Back

acid

Front

A substance that increases the hydrogen ion concentration of a solution.

Back

transition elements

Front

What are the elements in groups 3-12 called?

Back

solvent

Front

A liquid substance capable of dissolving other substances

Back

hydrogen bond

Front

A relatively weak bond formed between any hydrogen atom (which is covalently bound to a nitrogen or oxygen atom) and a nitrogen or oxygen with an unshared electron pair

Back

mass number

Front

number of neutrons and protons in nucleus

Back

period

Front

A horizontal row of elements in the periodic table; indicates the number of electron shells in an element

Back

atomic mass

Front

weighted average of all of the isotope's mass numbers found in nature

Back

metalloid

Front

Demonstrate properties of both metals and nonmetals. Examples are silicon and arsenic.

Back

stable octet

Front

the arrangement of eight electrons in the outermost shell of an atom

Back

group

Front

Vertical column in the periodic table; used to determine the number of valence electrons in an element

Back

lewis Structures

Front

Back

exothermic

Front

A chemical reaction that releases energy (heat)

Back

base

Front

A substance that decreases the hydrogen ion concentration in a solution.

Back

ionic bond

Front

Formed when one or more electrons are transferred from one atom to another; forms between metals and nonmetals

Back

indicator

Front

A compound that changes color in the presence of an acid or a base

Back

polyatomic ion

Front

A covalently bonded group of atoms that has a positive or negative charge and acts as a unit

Back

endothermic

Front

A chemical reaction that absorbs energy (heat)

Back

solute

Front

A substance that is dissolved in a solution.

Back

valence electrons

Front

electrons in the outermost shell (can be easily shared, gained or lost)

Back

diamond

Front

carbon arranged in a crystal lattice

Back

isotopes

Front

same number of protons and electrons but different number of neutrons

Back

anions

Front

Negatively charged ions

Back

reactants

Front

a substance that takes part in and undergoes change during a reaction

Back

polarity

Front

A lack of electrical symmetry in a molecule. Charge differences on opposite ends of a structure.

Back

atomic number

Front

number of protons in nucleus

Back

products

Front

The elements or compounds produced by a chemical reaction.

Back

coefficient

Front

A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.

Back

pH

Front

a numeric scale used to specify the acidity or basicity of an aqueous solution

Back

cations

Front

Positively charged ions

Back

covalent bond

Front

A chemical bond that involves sharing a pair of electrons between atoms in a molecule; occurs between nonmetals

Back