Show:
The Periodic Table
Atomic Structure
Types of Reactions
General Knowledge
Formulas & Names
100
Elements known as Alkaline Earth Metals commonly take on this charge?
What is +2
100
The atomic number of an element is the total number of which particles in the nucleus?
What is the proton
100
The substances found on the left hand side of the arrow in a chemical reaction are known as these
What are reactants
100
This type of nuclear reaction occurs in our nuclear power plants.
What is a fission reaction
100
Often called table salt, this is the chemical name for NaCl.
What is sodium chloride.
200
Elements on today's periodic table are arranged according to this?
What is their atomic number
200
An element has an atomic number of 76. The number of protons and electrons in a neutral atom of the element are ____?
What is 76 protons and 76 electrons
200
In this type of reaction, one chemical compound gets broken down into two or more new substances.
What is a decomposition reaction
200
In mathematical terms density is found by diving mass by what?
What is volume
200
What is the chemical formula for magnesium oxide?
What is MgO
300
Of the following elements Li, K, and S, this one is the biggest?
What is K
300
Isotopes of the same element have different numbers of these subatomic particles?
What is neutrons
300
This type of reaction occurs when two or more chemicals combine to form a single substance?
What is a synthesis reaction
300
Which field of science studies the composition and structure of matter and the changes it undergoes?
What is chemistry
300
Often called laughing gas the chemical has the formula N2O.
What is Dinitrogen monoxide or nitrous oxide.
400
Emission of light from an atom occurs when an electron does this?
What is drops from a higher to a lower energy level
400
How many protons, electrons, and neutrons does an ion have with atomic number 6, mass number 14 and charge +2 contain?
What is 6 protons, 4 electrons, and 8 neutrons
400
The products of the combustion of a hydrocarbon include these two compounds
What is water and carbon dioxide
400
What distinguishes a compound from a mixture?
What is mixtures can be separated physically, while compounds cannot.
400
When the metal lithium combines with the element sulfur this formula is the result.
What is Li2S
500
The number of electrons in the outermost energy level of an flourine atom?
What is 7
500
How many protons and electrons does the chloride ion have?
What is 17 protons and 18 electrons
500
In the double replacement reaction between silver nitrate and potassium chloride, these are the new products formed?
What is silver chloride and potassium nitrate.
500
These are the formulas of all of the diatomic molecules?
What is Br2,I2,N2,Cl2,H2,O2,F2
500
This name and formula of this chemical when mixed with bleach can produce poisonous chlorine gas.
What is ammonia, NH3