Matter
what happens when a liquid reaches its boiling point
it evaporates
ratio of H2ClKC6
2:1:1:6
Element with two protons?
Helium
how do you find atomic mass
electron/proton + neutron
Where can we find the proton number on the periodic table?
what is the theory explaining the way matter behaves
the kinetic particle theory
What is the name of the compounds formed when Elements other than hydrogen react with hydrogen?
Oxides
What is a vertical column of elements called in the periodic table?
Groups
Name an isotope for hydrogen
hydrogen-1, hydrogen-2, or hydrogen-3
A group of elements in a row in the periodic table is called a...
Group
what happens to solids when they are heated (not melted) hint:slight increase in __
expansion
What is the law that states that compounds are made up of fixed proportions of elements?
Law of constant composition
Latin name of Sodium
Natrium
What is the formula for (Ar) Relative Atomic Mass?
average mass of isotopes of the element/ 1/12 x mass of one atom of carbon-12 or over 100
how do we find electrons without knowing the charge
atomic mass - neutrons
how do particles of a solid behave
they vibrate and cant move past eachother
PbO + H2 ----> Pb + H2O
Which substance is the reducing agent?
H2
How many elements are on the periodic table?
118
Atoms of the same element which have different neutron numbers called isotopes
What is the formula to find the maximum amount of electrons in the electron shell when there is more than 20 electrons?
2n^2
name of the pressure at boiling point where the pressure of the gas created above the liquid is equal to that of the air hint:all around us
atmospheric pressure
Ca(OH)2
What is the ratio of the atoms present in the formula?
1:2:2
If an element has a proton number of 12 and an atomic mass of 24, how much neutrons are there and what is the charge?
neutrons = 12
charge = 0
What radioisotope is used for radiotherapy treatment
Cobalt-60
What force holds the electrons in a shell?
Electrostatic force