Matter
Give an example of a physical change and explain your answer
The number of atoms in 1 mole of carbon?
6.022 x 10 23 atoms
How many electrons are in a neutral atom of Fluorine?
9
The name of this compound
ZnCl2
A chemical reaction where two reactants make one product
Synthesis
Give an example of a chemical change and explain your answer
varies
The number of atoms in 1 mole of NaCl?
The ion Cl- has how many electrons?
18 electrons
The name of this compound
NO2
Nitrogen Dioxide
A chemical reaction where one element switches places with an ion in a compound
Single replacement
Helium
The number of molecules in 1 mole of H2O?
6.022 x 10 23 molecules of H2O
The ion Na+ has how many electrons?
10 electrons
Cu(OH)2
What is the charge on the Cu ion and EXPLAIN your answer
+2 charge because each OH has -1 charge
Two reactants (A and B) react in a 1:1 ratio to form a product. If 0.002 moles of A react with 0.003 moles of B, how many moles of product will be formed?
0.002 moles
A measure of the tendency for the nucleus of an atom to attract valence electrons.
Electronegativity
2H2 + O2 ---> ____ H2O
If 2 molecules of O2 reacts with 2 molecules of H2, how many molecules of water will be produced?
2 molecules of H2O
1s2 2s2 2p3 is the electron configuration for what element?
Nitrogen
The name of this compound
CuO
Copper (II) oxide
___ Na + ___ Cl2 ---> ___ NaCl
Balance this equation
2 : 1 : 2 ratio
The energy required to remove a valence electron from an atom
Ionization energy
A balloon has 3.011 x 10 23 atoms of helium. How many moles of helium are in the balloon?
1/2 a mole
Carbon dioxide (CO2) has how many total electrons?
22 electrons (6 + 8 + 8)
Na2(SO4)
Does this compound contain ionic or covalent bonds? EXPLAIN your answer
Ionic bonds because it's a metal + a nonmetal
2Mg + O2 ---> 2MgO
If 1 mole of Magnesium reacts with excess oxygen, how many moles of MgO will be formed?
1 mole