PHYSICAL/CHEMICAL
Periodic Table
COUNTING ATOMS
Reactivity
Atomic Structure
100
A ________ change is when a new substance is createed
What is a chemical change?
100
What number tells you the number of protons and electrons?
Atomic Number
100
How many oxygen atoms are present? Mg3(PO4)2
What is 8?
100
What is the name of the least reactive family on the periodic table?
Group 8A /Noble gases
100
Which 2 subatomic particles have approximately the same mass?
Protons and Neutrons
200
Name a food that is an example of a chemical change and explain why.
What is a cake, because you cannot turn a cake back into the eggs, flour, sugar, etc. that you mixed together?
200
How do you figure out the number of neutrons?
Subtract the atomic number from the atomic mass
200
How many Magnesium atoms are present? Mg3(PO4)2
What is 3?
200
Name the most reactive group(s)?
Why are they the most reactive?
Group 1A and 7A
because they want to be full and they match perfectly
200
What subatomic particle is located outside the nucleus and has a negative charge?
Electrons
300
List the 5 evidences of a chemical change
Gas, Light, Temperature, Color, Precipitate
300
How do you find the number of valence electrons?
By looking at the group number (only the A's)
300
How many total atoms are present in 2 H2O
What is 6?
300
What element is most likely to bond with the atom below?
Any element in group 1:
H, Li, Na, K, Rb, Cs, Fr
300
Draw a correct bohr model of a carbon atom.
400
In a chemical change, the particles of a substance are broken apart, and the atoms are rearranged into new particles, forming a ______ ____________.
What is a new substance?
400
Tell me the name of the element with 7 valence electrons and 5 electron orbitals.
Iodine
400
How many Pb (Lead) atoms are present? 2Pb(NO3)2
2
400
An atom of Beryllium is shown. Name one element that is chemically similar to Beryllium.
Any element in group 2: Mg, Ca, Sr, Ba, Ra
400
What is the atomic mass of an atom with 13 protons, 14 neutrons, and 13 electrons?
27amu
500
What is the mass of oxygen in chemical reaction if you follow the law of conservation of mass:
1CH4 + 2O2 -> 1CO2 + 2H2O
13g + __?__ -> 9g + 16g
12g
because if the Product side totals to 25g then the Reactant side also has 25g.
500
What is the number of neutrons and the name of the element with two valence electrons and 4 energy levels
Calcium, which has 20 neutrons
500
How many total atoms are present in this compound?
2Be(NO3)2 + 2RbF
What is 22 total atoms.
500
Arsenic:
Number of valence electrons?
Number of electron orbitals?
Reactivity level
Metal, non-metal, metalloid?
1) 5 valence
2) 4 orbitals
3) medium reactivity
4) metalloid
500
What element is this?
Nitrogen