atom
BONUS FREE POINTS
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Pure Substance:
Is any substance that the particles that make it up are the same.
BONUS
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what is the definition of matter
The matter is anything that has a mass and volume.and
Matter can exist in three states (or forms), Solid, Liquid, or Gas (Plasma).
use the periodic table to find the number of neutrons the element iron
30
what are atoms made up of?
Atoms are made up of 3 subatomic particles. Atomic = atom, sub= below or smaller.
what is an example of a compound
H2O (water, diHydrogen monoOxygen)
what is does the first shell fill up to
2
The state of matter can change by temperature or pressure changes. true or false
TRUE
How do you find the number of neutrons for an element
To find the number of Neutrons, Atomic Mass - Atomic Number
what is the definitions of a proton
These are positively charged particles +, they are in the centre region of the atom, they are very very very very very… heavy for their size.
what is the smallest unit of a compound
a molecule
what does the 2nd shell fill up to
8
what is gas
Gas does not have a definite shape or volume.
Gas can be compressed and expanded.
Gas is made of particles and empty spaces are between the particles. All matter is made of particles.
what does a symbol stand for on the periodic table
Is an abbreviation of the chemical name. It always has a CAPITAL letter as the first letter, if it has a second or third letter, it is lower case.
what is the definition of a neutron
These have no charge, they are in the centre region of the atom, they are very very very very very… heavy for their size.
what is a compound
Compounds are two or more elements chemically combine.
What does the third shell fil up to
8
particles in the matter are never on the move true of false
FALSE
what is the atomic mass
Atomic Mass = This is the mass of the protons + the neutrons.
what is the definitions of an electron
These are negatively charged -. This orbit the centre of the atom. They travel very very very very very quickly. These have so little mass that we don’t count the mass when recording the mass of an atom.
Mixtures:
Two or more substances that are not chemically combined.
what does the 5 shells fill up to
18
name an example of a mixture
kool aid
what is the atomic number
Atomic Mass = This is the mass of the protons + the neutrons.