How can we help?
You can also find more resources in our
Select a category
Something is confusing
Something is broken
I have a suggestion
What is your email?
What is 1 + 3?
Upgrade to remove ads
change of state from a solid to a liquid
change of state from a liquid to a solid
change of state from a gas to a liquid
change of state from a liquid to a gas
change of state from a solid to a gas
change of state from a gas to a solid
characteristics that can be used to describe a substance
colour, lustre, melting point, boiling point, hardness, malleability, ductility, crystal shape, solubility, density are examples of these
bawah - burn, air, water, acid and heat are all ways in which a substance can interact
made up of one kind of matter
pure substance that cannot be broken down into any simpler substance
two or more elements that have combined
a combination of more than one substance
each substance in the mixture is visible
of the same kind; uniform in composition throughout, appears like one (also called a solution)
when a material changes state, can be reversed
occurs when two or more substances react and create new substances, a change in colour, odour, light given off, formation of a gas or solid are ways to tell
Most reactive metals on periodic table. Very reactive to water and air. Group 1 on table.
Alkaline Earth Metals
Group 2 on periodic table. 2nd most reactive group of metals on the table
Billiard Ball Theory - All atoms were balls of different size.
Raisin Bun Model - Negative charges (electronspread out through positive sphere
Solar System Model - negative charges orbit around a positive sphere
Discovered the nucleus and that atoms are mainly empty space
Electron Shell Model - electrons orbit the nucleus in shells and each shell holds a certain amount of electrons.
Discovered the protons and neutrons inside the nucleus.
Group 17 on periodic table. Most reactive non-metals. Chlorine is a well known one from this group.
Group 18 on periodic table. These elements do not react with any other element on the periodic table as their valence shell is full of electrons.
Vertical column on the table - there are 18 of them.
Horizontal row on the table - there are 7 of them.
Are all located on the left of the staircase. Properties of metals include: conduct electricity, shiny, malleable, ductile.
Are all located on the right of the staircase. Properties include: can be solid or gas, dull and brittle.
Are a unique set located near the staircase. These elements can display properties of both metals and non-metals.
Number of protons in an atom of an element
Number of protons + neutrons in the nucleus of an atom of an element.
The father of our modern day periodic table. Arranged elements in order of increasing atomic mass and left blanks for the undiscovered elements at the time.
positive charge found in nucleus of atom (p+)
Negative charge found orbiting nucleus of atom (e-)
Neutrally charged particle found in nucleus of atom (n)
Number of Protons in Oxygen
Number of Neutrons in Calcium
Symbol for Neon
Atomic Mass of Lithium
Ion Charges on Cu
+ and 2+
metal + non-metal
Upgrade to remove ads