Chemistry Midterm Review Flashcards
What type of ions have names ending in ide?
Anions, negative, non metals
A billiard ball has more mass than a marble because it
Has more matter
Identify processes involving a change in physical properties?
Change in shape, size, state (liquid-> solid -> gas)
What is true for all chemical reactions?
Conservation of mass
Explain the law of conservation of mass
Total mass of the reactants = total mass of products
Identify subatomic particles and everything you know around atoms about them? Charge, mass, location
Neutron- in nucleus, no charge, 1 amu
Proton- in nucleus, positive charge, 1 amu, atomic number= protons
Electron- around nucleus in electron cloud, negative charge, -p=n
The atomic number of an element is = to what
subatomic particle?
of Protons
How many protons, electrons, and neutrons does an atom with atomic number 60 and mass number 125 contain?
60 protons, 60 elections, and 65 neutrons. Mass #- atomic #= neutrons
How many valence electrons are in an oxygen atom?
6
Define molar mass
The mass of one mole of a substance
What is true about the molar mass of nitrogen gas?
Molar mass of N=14.07 g/mol but molar mass of Nitrogen gas= 28. 014 g/mol
The mass of a mole of MgF^2 is?
24+19+19=62 g/mol
Which elements form an ion with a 3– charge?
F, Cl, Br, I, At
Why do atoms share electrons in covalent bonds?
Meet the octet rule
Which elements can form diatomic molecules held together by triple covalent bonds? (HONClBrIF)
Hydrogen, oxygen, nitrogen, chlorine, bromeme, iodine, fluoride
