Which of these elements does not exist as a diatomic molecule?
a) Ne
b) F
c) H
100
Tin
The is the name for the element Sn?
100
An attraction between polar molecules
What causes dipole interactions?
200
The degree of compactness of a substance.
What is Density?
200
How close a measurement is to the true value
What is Accuracy?
200
b) 4.0 mol
What is the number of beryllium atoms in 36g of Be?
a) 0.25 mol
b) 4.0 mol
c) 45.0 mol
200
98.9072
What is the atomic mass of the element TC?
200
a) giving foods a sour taste
b) forming solutions that conduct electricity
c) causing indicators to change color
Name three properties of acids.....
300
a) 78
b) 195
c) 78
If an element has 78 electrons and 117 neutrons what is the:
a) Atomic Number
b) Mass Number
c) Number of Protons
300
All elements are composed of tiny individual particles called atoms.
What was Dalton's Atomic Theory?
300
b) reactants are two ionic compounds
In a double-replacement reaction, the ________________.
a) products are always molecular
b) reactants are two ionic compounds
c) reactants are two elements
300
20
What is the number of the element Calcium?
300
Mole
What SI unit is used to measure the number of representative particles in a substance?
400
Democritus and Isaac Newton
Name at least two scientist that were involved in determining the structure of an atom?
400
LOSE
Do metals lose or gain electrons to attain noble gas configuration?
400
c) volume-volume problems
Which type of stoichiometric calculation does not require the use of molar mass?
a) mass-mass problems
b) mass-volume problems
c) volume-volume problems
400
a) Arsenic
b) Bromine
c) Neon
Name the following elements:
a) As
b) Br
c) Ne
400
b) is equal to the mass of the reactants
In a chemical equation, the mass of the product _______.
a) is less than the mass of the reactants
b) is equal to the mass of the reactants
500
a) Sodium Chloride
_________________
a) Fe^3P^2
b) S^4N^2
Name the following:
a) NaCl
White the formula for the following:
a) Iron (II) Phosphide
b) Tetra-Sulfur Di-Nitride
500
Ionic bonds transfer their electrons.
Covalent bonds share their electrons.
Ionic Bonds - ......
Covalent Bonds - .....
500
a) Reduction
In which of the following types of reaction are electrons gained?
a) Reduction
b) Oxidation
c) Both a and b
500
Meitnerium
What is the name of the element - Mt
500
Sodium
In the reaction of sodium with oxygen, which atom is the reducing agent?