First to see an atom under microscope but could not see the charges
Who is John Dalton?
Bonds that share electrons
What are covalent?
Ability to turn metals into a wire
What is ductility
How many grams are in 3.7 moles of Na2O?
230
___ C + ___ S8 --> ___ CS2
4, 1, 4
Atomic Model mostly used by Chemists
What is the Bohr Model?
Bonds that give or take away electrons
What are ionic bonds
Which elements have a mix of metal and nonmetal properties?
Metalloids
How many atoms are in 14 moles of cadmium?
8.4 x 1023
___ Na + ___ O2 --> ___ Na2O
4, 1, 2
List the charges of protons, neutrons and electrons and where they are located in an atom.
Protons positive in nucleus
Neutrons Neutral in nucleus
Electrons negative outside nucleus
Which bond are good conductors with low melting points?
Ionic bonds?
Is sulfur a metal or non metal
Nonmetal
How many moles are in 4.3 x 1022 atoms of H3PO4?
7.1 x 10-2
___ Mg + ___ Cl2 --> ___ MgCl2
1,1,1
How many protons are in this element?
13
Non metals bonding with nonmetals
Covalent Bonds
The ability for metals to shine bright
What is luster?
12.3 grams of CO2
.28 moles
___ C6H6 + ___ O2 --> ___ CO2 + ___ H2O
What type of reaction is this?
Combustion
How many neutrons are in this element?
14
How many electrons does Na3+ have?
8
Why is hydrogen on the metal side of the periodic table but is a nonmetal
What is number of electrons
Determine the empirical of a compound composed of 18.24 g Carbon, 0.51 g Hydrogen, and 16.91 g
The percent composition of an unknown substance is 75.42 % Carbon, 6.63 % Hydrogen, 8.38 % Nitrogen, and 9.57 % Oxygen. What is its empirical formula?