Properties
How shiny or dull a substance is
Lustre
Completely unreactive, they are all gases
Noble gases
Name any scientist that we did not learn about
Isaac Newton
Charles Darwin
Albert Einstein
This element is the lightest element on the periodic table and has only 1 proton.
Hydrogen
The number of Hydrogen atoms in molecule of table sugar (C12H22O11)
22
How well something can be pounded into a sheet
Malleability
Extremely reactive metals but include Hydrogen
Alkali metals
Thought of atoms like Plum Pudding
JJ Thompson
If you inhale this noble gas, your voice sounds super high-pitched.
Helium
This compound is made of one carbon atom and two oxygen atoms
Carbon Dioxide
The ability for something to be drawn and pulled into wires
Ductility
Share properties of metals and non-metals forming a staircase
Metalloids
Electrons travel in rings like orbits around a nucleus
Niels Bohr
These two elements are known as the coinage metals
Gold & Silver
This molecule has 2 hydrogen atoms and 1 oxygen atom, but we do not call it hydrogen oxide
Water
Name two signs that a chemical reaction may have occurred.
colour change
gas produced
temperature change
precipitate forms
light produced
Which family of elements is known for having 7 valence electrons and being very reactive?
Hallogens
Played with Gold foil to show that atoms were mostly empty space
Ernest Rutherford
This element is the most reactive non-metal and sits in Group 17.
Fluorine
This molecule contains only one type of element, meaning it is not actually a compound.
o2 (dioxygen)
n2 (Nitrogen gas)
A student heats a blue solid. It turns black and releases a gas.
Did a physical change or chemical change occur? Explain why.
Chemical change- new substances formed
These elements can have different numbers of valence electrons.
Transition metals
Said that you couldn't break up these things any further
Democritus
This element makes up about 78% of Earth’s atmosphere.
Nitrogen
This element has the electron configuration 2–8–7, meaning it only needs one more electron to fill its outer shell.
Chlorine