This person came up with the law that states that compounds have an unchanging chemical formula.
Joseph Proust
100
Give three examples of elements in the alkaline earth metal family. (Symbols are fine)
Be, Mg, Ca, Sr, Ba, Ra
100
This number tells you the number of protons present in an element.
Atomic number
100
What is a polyatomic ion?
An ion that contains multiple atoms
100
This law states that mass is neither created or destroyed in a chemical reaction.
Law of Conservation of Mass
200
This person came up with the atomic theory of atoms.
Dalton
200
Which of the following does not belong in this group: He, Ne, Ar, Br, Kr, Xe, Rn
Br
200
If an atom gains electrons, it is given this name.
Anion
200
What is the prefix for 7?
Hepta
200
What is the law of definite proportions?
A compound will always contain the same number of elements.
300
The cathode-ray tube experiment discovered what part of the atom?
The electron
300
What is the difference between an isotope and an ion?
Isotope: different number of neutrons
Ion: different number of electrons
300
Carbon-14 has how many neutrons, protons and electrons?
Protons: 6
Electrons: 6
Neutrons: 8
300
Give the name for the compound: CaO
Calcium Oxide
300
Which of the following pairs illustrates the law of multiple proportions? CH4, CO2 | NH4, NH4Cl | NO, NO2 | H2O, HCl | ZnO2, ZnCl2 | CO, CO2
CO, CO2 and NO, NO2
400
This experiment was discovered that the atom contains a positively-charged nucleus.
Gold foil experiment
400
An alkaline earth metal and a halogen bond together to form what type of bond?
Ionic bond
400
Give the number of protons, neutrons and electrons for the phosphide ion.
Protons: 15
Neutrons: 16
Electrons:18
400
Give the formula for the following compound and give the type of bond that is formed: Tin (IV) Oxide
SnO2, ionic bond
400
Copper (III) oxide is 74.5% tin and 25.5% oxygen. If 20.0 g of the material was analyzed, what masses of copper and oxygen must be present to determine if the substance is pure?
14.9 g Copper, 5.1 g Oxygen
500
After Thomson's discovery, he created this model of the atom. Give the name and draw what it looks like.
The plum pudding model
500
This atom is a nonmetal, forms an anion with a 3- charge and often bonds with H to make a polyatomic ion.
Nitrogen
500
What element has 20 neutrons and 18 electrons when it forms an ion with a 2+ charge?
Calcium
500
Rewrite this formula so that it's correct: H2MnO4
HMnO4
500
Laughing gas is a compound formed from nitrogen and oxygen in which there are 1.75 g of nitrogen to 1.00 g of oxygen. In a second sample, there are 9.50 g of N and 1.75 g O. Which of the three laws does this information support?