Atoms
Who is credited with the discovery of the electron and coming up with the "Plum Pudding" Model of the atom?
Who is JJ Thompson.
Who is credited with the organization of the elements on the periodic table?
Who is Dmitri Mendeleev
A change in colour occurs as a result of a chemical reaction.
What is a chemical change.
A pure substance that is made up of only one kind of particle that cannot be broken down any further?
What is an element.
How many atomic models have been accepted by Science throughout history?
5
What are the horizontal rows in the periodic table called? What are the vertical columns called?
what are Periods and Groups
you take an ice cube out of the freezer and let it sit on the counter and it melts.
What is a physical change
elements of this group share some properties of metals and some properties of non-metals
What is metalloids
Who's model of the atom is still accepted and used in science today?
Neils Bohr
What element has 7 electrons in its outershell and a mass of 18.998?
What is Fluorine.
baking a cake is an example of a __________ change
What is chemical
An element that has gained either a positive or a negative charge due to the transfer of electrons.
What is an Ion.
How does an atom become negatively charged?
Gains an electron through forming an Ionic bond with one or more elements.
Who is credited with the Atomic Theory?
John Dalton
What kind of compound is created by the bonding of a metal and a non metal?
What is an Ionic Compound?
A substance reacts when mixed with another substance by forming a gas (bubbles).
What is chemical reaction and change.
The three different types of mixtures and their properties
How can we find the number of neutrons in an atom's nucleus?
Subtract the atomic number from the atomic mass.
Who proved that an atom has a positively charged centre by conducting an experiment with gold foil and beams of alpha particles?
Who is Ernest Rutherford.
Which elements make up the following compound? Is the compound Ionic or Molecular?
ZnSO4
What is an Ionic Compound made up of Zinc, Sulfur, and Oxygen.
You mix water and cornstarch together to create a paste.
What is an example of a physical change.
A bond where electrons are shared between two or more atoms.
What is a Covalent bond.