Unit 1A
This instrument uses three beams to measure mass very precisely
What is a Triple Beam Balance?
A heterogeneous mixture containing tiny particles that never settle out.
What is a Colloid?
The atomic number shows…
The number of protons in an element
Name the covalent bond: SF2
Sulfur difluoride
This law indicates that in ordinary chemical reaction…
Matter cannot be created or destroyed
No change in total mass occurs in a reaction
The mass of the products is equal to eh mass of reactants
The number of atoms on the reactant side is equal to the number of atoms on the product side
What is the law of conservation of mass?
The standard unit of temperature.
What is Kelvin?
A heterogeneous mixture containing a liquid in which visible particles settle
What is a suspension?
This number is found by adding the number of protons and neutrons in an atom.
How is the mass number found?
What is the cation for magnesium?
Mg2-
What type of reaction is the following:
A + B —> AB
Synthesis reaction
The building block of all matter
What is an Atom?
A state of matter that has a definite volume, but not a definite shape
What is a liquid?
Atoms of the same element that have different masses
What are Isotopes?
a measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound.
What is electronegativity?
6.022 x 1023
What is Avogadros Number?
Material made of two or more atoms that are combined.
What is a compound?
A state of matter that not have a definite volume or definite shape
What is a gas?
This scientist discovered the neutron.
Who is James Chadwick?
A bond that is formed when atoms of nonmetals share their valence electrons
What is a covalent bond?
This type of reaction always results with water and carbon dioxide
What is Combustion?
A material made up of two or more substances
What is a Mixture?
A characteristic of a substance that can be observed without changing the substance into another substance.
What is a physical change?
This color has the shortest wavelength.
What is red?
Name the ionic compound: CuF2
Copper (II) fluoride
How many grams are in 5 moles of aluminum?
134.9 g