Lecture 2 Flashcards Preview

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Flashcards in Lecture 2 Deck (20):
1

Chemical bond

An attraction between two atoms resulting from a sharing of of outer shell electrons or presence of opposite charge on atoms

2

Chemical reaction

The making and breaking of chemical bonds leading to changes in composition matter.

3

Compound

A substance consisting of two or more different elements combined in fixed ratio

4

Covalent bond

A type of strong chemical bond in which two atoms share one or more parts of valence electrons.

5

Electron shell

An energy level of electrons at characteristic average distance from the nucleus of an atom.

6

Electron

A subatomic particle with a single negative electrical charge and mass. One or more electrons move around the nucleus of an atom.

7

Element

Any substance that can't be broken down by chemical reactions.

8

Hydrogen bond

Weak chemical bond that's formed when the positive hydrogen atom of a polar covalent bond is one molecule is attracted to the negative atom of a polar covalent bond in another molecule.

9

Ion

An atom that has gained or lost one or more electrons thus Acquiring a charge.

10

Ionic bond

A chemical bond resulting from the attraction between oppositely charge ions.

11

Isotope

One of several forms of an element, each with same number of protons but different number of neutrons

12

Molecular formula

A type of molecular notation representing the quantity of constituent atoms

13

Molecule

The two or more atoms held together by covalent bonds

14

Neutron

Subatomic particle with no charge.

15

Product

A material resulting from a chemical reaction

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Proton

Subatomic particle with a positive charge.

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Reactant

A starting material in chemical reaction

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Structural formula

A type of molecular notation in which the constituent atoms are joined by lines representing covalent bonds

19

Valence

The bonding capacity of a given atom

20

Atom

The smallest unit of matter that retains the properties of an element.