2.1-2.3 bio quiz

Water is ________ because one side of the molecule is positive and the

other is negative.

Polar

The ability of water to dissolve many different substances

Universal solvent

The strong force that holds water molecules tightly together at the surface of a liquid is

Surface tension

The attraction of water molecules to each other

Cohesion

When a water molecule clings to a window and forms drop of water it is displaying

Adhesion

The tendency of water droplets to stick to other objects is

adhesion

The attraction of water molecules to other substances

Adhesion

Waters nickname because it can dissolve more substances than anything else on earth

Universal Solvent

The tendency of water droplets to stick together is called

Cohesion

What is adhesion

Is the attraction between two different particles

When water molecules stick to each other that is called

Cohesion

Pull of water molecules upward against gravity using the properties of cohesion and adhesion

Capillary action

What is cohesion

The sticking of particles of the same substance

Molecules having uneven distribution of charges like a magnet

Polar

Chemical formula for water

H2O

Element

A substance that cannot be broken down to other substances by chemical reactions

Compound

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

What 4 elements make up most of human matter

Oxygen, carbon, hydrogen, and nitrogen

Atom

Smallest unit of matter that still retains the properties of an element

Charge of proton

Positive

Charge of electron

Negative

Charge of neutron

Neutral

Isotope

form of an element that has the same number of protons as other atoms of the same element, but a different number of neutrons.

Valence electrons

the electrons in the outermost shell, or energy level, of an atom

Chemical bonds

the force that holds atoms together to form molecules and compounds

Covalent bonds

The sharing of a pair of valence electrons by two atoms

Single bond

Pair of shared electrons

Double bond

Sharing of two pairs of valence electrons

Electronegativity

The attraction of a particular atom for the electrons of of a covalent bond

Ion

Opposite charged atoms

Cation

Positive charge ion

Anion

Negative charged ion