occupies space or mass

quantity of matter

pull of gravity on an object

simplest particle of an element

has a + charge

has no charge

has a - charge

properties of atoms determine the ____ and ____ of the matter they compose

electrons orbit the ___ of the nucleus

pure substance that cannot be broken down chemically into simpler kinds of matter

____ contains most of the mass of the atom

substance made of atoms of different elements bonded together in a certain ratio

atoms become stable by ______

positive and negative electrical charges attract

sharing pairs of electrons

most abundant and stable molecule

____ connect molecules together

molecules do not share the electrons equally

hydrogen acts as

oxygen acts as

hydrogen bonds exist between water molecules.....

amount of energy a substance can absorb

water release energy _____

high specific heat maintains _____

requires a lot of energy to break the hydrogen bonds in the water

water has a different density as a ___ than a ____

when water freezes molecules leave ___

substances are evenly distributed

A solutions is also called a _____ mixture

components are not evenly mixed

materials do not dissolve in water but break into small pieces

doing the dissolving

water molecules attract other water molecules

helps insects walk across water due to high surface tension

gives water drops their shapes

water sticks to other molecules like a band aid sticks to skin

water molecules tow each other along in a glass tub or paper towel

after neutralization H+ is left

after neutralization left with OH-

pH scale range

Buffers what should a humans cell's pH levels be

cells containing weak acids and weak bases

what should humans ph levels be

some atoms share ________

shared electrons fill the _____ energy levels of the bonded atoms

water does not share electrons ____

plants get H2O from their roots to the upper branches without using energy because of ........

hydrogen ions

hydroxide ions

acid

base