ChemistryVocab.txt

The knowledge obtained by observing natural events and conditions in order to discover facts and formulate laws or principles that can be verified or tested

The application of science for practical purposes

A summary of many experimental results and observations; a law tells how things work

An explanation for some phenomenon that is based on observation, experimentation, and reasoning

The ability and willingness to assess claims critically and to make judgements on the basis of objective and supported reasons

OHEC Used go solve problems

A factor that changes in an experiment in order to test a hypothesis

A measure of the straight-line distance between two points

A measure of the amount of matter in an object

A measure of the size of a body or region in 3 - dimensional space

A measure of the gravitational force exerted on an object

A method of expressing a quantity as a number multiplied by 10 to the appropriate power

The exactness of the measurement

A prescribed decimal place that determines the amount of rounding off to be done based on the precision of measurement

A description of how close a measurement is to the true value of the quantity measured

The scientific study of the composition, structure, and properties of matter and the changes that matter undergoes

Anything that has mass and takes up space

A substance that cannot be separated or broken down into simpler substances by chemical means

The smallest unit of an element that maintains the properties of that element

Is substance made of two or more different elements that are chemically combined

the smallest unit of a substance that keeps all the physical and chemical properties of that substance

A combination of chemical symbols and numbers to represent a substance

A sample of matter, either a single element or a single compound, that has definite chemical and physical properties

Matter that has a fixed composition and definite properties

The combination of two or more substances that are not chemically combined

A mixture where the substances are not mixed uniformly and are not evenly distributed

A mixture with substances that are mixed uniformly and evenly distributed

The temperature and pressure at which is solid becomes a liquid

The temperature at which a liquid becomes gas

The ratio of the mass of a substance to the volume of a substance

The ability of a substance to combine chemically with another substance

The ability of a substance to react in the presence of oxygen and burn when exposed to flame

A change of matter from one form to another without a change in chemical properties

A change that occurs when a substance changes composition by forming one or more new substances

A state of matter that starts as a gas and then becomes ionized

The capacity to do work

The kinetic energy of a substance's atoms

The change of a substance from a liquid to a gas

The process in which a solid changes directly into a gas (sometimes used for reverse process)

The change of a substance from a gas to liquid

A non solid state of matter in which the atoms or molecules are free to move past each other, examples include a gas or liquid

The upward force exerted on an object immersed in or floating on a fluid

Amount of force exerted per unit area of a surface

The principle that states the buoyant force on an object in the fluid is an upward force equal to the weight of the volume of fluid that the object displaces

The SI unit of pressure, equal to the force of 1 N exerted over an area of 1 m² (abbreviation, Pa)

Principle that states that a fluid in equilibrium contained in a vessel in search of pressure of equal intensity in all directions sensible that states that a fluid in equilibrium contained in a vessel in search of pressure off in clinton city in all directions

The resistance of a gas or liquid to flow

For a fixed amount of gas at constant temperature, the volume of a gas increases as the pressure of the gas decreases and vice versa

For a fixed amount of gas at a constant pressure, the volume of the gas increases as the temperature of the gas increases and vice versa

If the pressure of the gas increases as the temperature increases if the volume of a gas does not change

An atom's central region which is made up of protons and neutrons

A subatomic particle that has a positive charge and that is found in the nucleus of an atom

A subatomic particle that has no charge and that is found in the nucleus of an atom

A subatomic particle that has a negative charge

A region in an atom where there is a high probability of finding electrons

An electron that is found in the outermost shell of an atom and that determines the atoms chemical properties

When elements are arranged this way, similarities in their properties will occur in a regular pattern

A horizontal row of elements in the periodic table

A vertical column of elements in the periodic table

An atom or group of atoms that has a lost or gained one or more electrons and has a negative or positive charge

The number of protons in the nucleus of an atom

The sum of the numbers of protons and neutrons in the nucleas of an atom

An atom that has the same number of protons as other atoms of the same element do, but that has a different number of neutrons

Unit of mass that describes the mass of an atom or molecule, it is exactly one- twelfth of the mass of a carbon atom with mass number 12

The weighted average of the masses of all naturally occurring isotopes of the element

Element that is shiny and conducts heat and electricity well

Element the conducts heat and electricity poorly

An element or compound that conducts electric current better than an insulator but not as well as a conductor

An Element of Group 1

• Soft
• Shiny
• Reacts violently with water

Element in group 2

Reactive but not as much as Alkali

Element of Groups 3-12

Not as reactive

Element of group 17

Reactive

Unreactive element of group 18

The SI base unit used to measure the amount of a substance whose number of particles is the same as the number of atoms of carbon in 12 g of carbon - 12

Equals 6.022 ✖ 10²³/ mol ; The number of particles in 1 mol

Mass in grams of one mole of a substance

The attractive force that holds atoms together

Arrangement of atoms in a substance

Average distance between two nuclei of two bonded atoms

Angle formed by two bonds to the same atom

• Bond formed by oppositely charged ions
• Conducts electricity in water

A bond formed by the attraction between positively charged metal ions and the electrons around them

Bond formed when atoms share one or more pairs of electrons, they are often formed between non metal atoms

An ion made of two or more atoms

Composition of a compound in terms of the relative numbers and kinds of atoms in the simplest ratio

Tells how many atoms are in one molecule of the compound

Covalently bonded compound that contains carbon, excluding carbonates & oxides

Large molecule that's formed by now than 5 monomers (small units)

Any organic compound that is made of carbon, hydrogen, and oxygen and that provides nutrients to the cells of living things

Organic compound that is made of one or more chains of amino acids and that is a principal component of all cells

Any 1 of 20 different organic molecules that contain a carboxyl and amino group and that combine to form proteins