Periodic Table
How many periods are there on the periodic table?
Seven
Is burning toast in the toaster a physical or chemical change?
Chemical change
How many atoms are in the following molecules?
H2C2
Four
The Law of Conservation of Mass states that matter cannot be ___________ or ______________.
created or destroyed
What are the three subatomic particles, and their charges?
Proton (+), Neutron (0), Electron (-)
Which family has a full shell of valence electrons, and does not like reacting to any other elements?
Noble Gases/Family 18
Is melting ice a physical or chemical change?
Physical change
How many atoms are in this molecule?
PO3 + H2
Six
Does this equation follow the Law of Conservation of Mass?
H2 + N2 --> 2NH
Yes, 2 atoms of nitrogen and hydrogen on both sides
Which two subatomic particles are located in the nucleus, and what is the nucleus's charge?
Protons and Neutrons (+)
Name one element in the halogens family on the periodic table.
Fluorine, Chlorine, Bromine, Iodine, Astatine
Two chemicals are put together, and they start to bubble and heat up. Are these evidence of a physical or chemical change?
Chemical change
How many atoms of each element are present in this chemical equation?
4H2O + P3
8 hydrogen, 4 oxygen, 3 phosphorus
Does the following equation follow the Law of Conservation of Mass?
SO3 + H2O ----> H2SO4
Yes, 2 hydrogen, 4 oxygen, 1 sulfur
What is the atomic mass of an element with 34 protons, 36 Neutrons, and 34 electrons?
70 amu
Is sodium (Na) more similar to rubidium (Rb) or silicon (Si), and why?
Rubidium, because they're in the same family.
Dry ice is left out at room temperature, and slowly turns into a gas. What is this process called, and is it a physical or chemical change?
sublimation, physical change
How many total atoms are in the following equation?
2NH3 + 3PO4 + (AlO3)2
31 total
Does the following equation follow the Law of Conservation of Mass?
H2Cl + NH3 -------> NH4Cl
No, 5 hydrogen atoms on reactants side, 4 hydrogen atoms on product side.
How many neutrons does an atom with 21 electrons and an atomic mass of 44 amu have?
23 neutrons
List the following elements from least to most reactive.
platinum, sulfur, lithium, xenon, zirconium
xenon, sulfur, platinum, zirconium, lithium
Give an example of an oxidation reaction, and whether it is a physical or chemical change. (hint:think of what happens to certain metals when exposed to oxygen overtime.)
Rusting (a bike rusting, the Statue of Liberty, penny turning green, etc.), chemical change
How many atoms of each element are there?
2NaCl + 4FeO2 + (Cl2C)3 + 3O2
2 sodium, 8 chlorine, 4 iron, 14 oxygen, 3 carbon
Dos the following equation follow Law of Conservation of Mass?
2Al + 3H2SO4 ------> Al2(SO4)3 +3H3
No, 6 hydrogen atoms on reactants side, 9 hydrogen atoms on products side
How many electrons does an element with 56 protons, 58 neutrons, and an atomic mass of 114 amu have?
56 electrons