Science test

Matter

anything that occupies space and has mass

atoms

matter made up by tiny particles

subatomic particle

protons, neutrons and electrons

what charge is a proton

positive

what charge is a neutron

no charge

what is the charge for an electron?

Negative

atomic number

how many protons there is in an atom

mass number

the atomic mass rounded to a whole number. it is protons+neutrons

Ions

an atom with charge

Cations

positive charged atoms

anion

negatively charged atoms

isotopes

Atoms of the same element with a different number of neutrons. they change the mass number but they are still the same element just maybe different properties

what is the mnemonic for metric conversions?

K.H.D.B.D.C.M (king henry died by drinking chocolate milk)

Period

A row

A row

a period

A group

A column

Noble gases

They are apart of the chemical family. They are nonmetals and they are non reactive. They are in group 18

Lanthanides

elements 57-71

Shiney, soft, silvery metals

Actinides

elements 89-103 metals that are very radioactive many are radioactive

element

basic building block of matter- made up entirely of one type of atom

molecule

formed when two or more atoms are joined together chemically

compound

what you get when two atoms of two or more different elements join together

Quantitative

mesurements

Qualitative

made using senses

Are you able to make both qualitative and qualitative observations of matter?

Yes, you can measure and use your senses at the same time ect.

Physical property

Characteristics of traits that help identify or classify matter that can be observed without changing the composition of the subsatnce

Examples of physical properties

density, volume, mass, state (solid, liquid, gas) color, size, shape, texture, luster, malleability, elasticity, flexibility, conductor, sink, float and the ability to dissolve

Chemical properties

It describes matter based on its ability to change into a new kind of matter

examples for chemical properties

flammability, tendency to rust, ability to react with other chemicals, ability to tarnish and the ability to decompose

physical changes

changes to the form or appearance. It does not change the substance into anything new

examples of physical changes

crushing a can, boiling water, dissolving sugar, and dicing veggies

Chemical changes

When two or more substances join to form new substances with new chemical properties.

examples of chemical changes

iron rusting, gas burning, eggs cooking and breads rising

chemical reactions

Occurs when two or more substances interact and the molecules change into a new substance

atomic mass

average mass of all the isotopes of an element