Periodic Table
What is the symbol for Potassium ?
K
Who proposed the atomic theory?
John Dalton
When water evaporates into the air, what kind of change occurs?
Physical Change
In a covalent bond, atoms _______ electrons.
Share
Mg(s) + 2HCI(aq) --> MgCI2(aq) + H2(g)
Synthesis, decomposition, single displacement or, double displacement ?
Single Displacement
What is the most conductive metal on the period table?
Silver
What did the atomic theory state?
All matter is composed of atoms, all atoms of the same element are identical, atoms of different elements are different, and atoms unite in definite ratios to form compounds.
Compounds are chemically combined, but they can be physically separated.
True or False
FALSE
Is water a Ionic bond or Covalent bond?
Covalent Bond.
What is the chemical formula of Aluminum Chloride?
AlCl3
Each vertical column on the periodic table is known as a ______?
Group (or family)
What is a positive part of an atom?
The Nucleus
What type of mixture is salt water?
Solution
TRUE OR FALSE
The atoms seek to fill their outermost shell with eighteen electrons.
FALSE
What is the chemical formula of lithium oxide?
Li2O
What is the group number of Helium and Neon?
Group 18 (noble Gases)
How do you calculate the number of neutrons in an atom?
Atomic mass - Atomic Number = # of neutrons
When elements copper(Cu) and Oxygen (O) chemically combine, what do they form?
A compound.
What kind of force holds positive and negative ions together?
Electromagnetic force
What is an acid base indicator?
A substance that indicates how acidic or basic a solution is through physical properties; watery or slippery, through colour change; sour or bitter (taste)
Nickle, Copper, and Gold are which part of the group?
Transition Metals
What is the purpose of the Atomic Number?
It shows how much protons are in an atom's nucleus.
Which changes MUST happen for elements to become a compound?
Chemical bonds form between atoms.
When carbon shares it's valence electrons with 4 Hydrogen atoms, would this then be a ionic bond or a covalent bond.
Covalent
Balance the formula below.
Br2 + NaI --> I2 + NaBr
Br2 + 2 NaI --> I2 + 2 NaBr