Atoms, Elements, Compounds Flashcards
(32 cards)
Which scientist tried to explain about atoms?
Dalton
What are atoms?
They are tiny particles.
What are the 3 components of the Dalton model?
- All matter is made up of atoms
- There are different types of atom
- Each element contains a different type
How many types of atom does an element contain?
One
Elements have different
Properties
How many elements are there?
Over 100
What is the symbol for iron?
Fe
What is the symbol for carbon?
C
In the Periodic Table, the columns are called
Groups.
Elements in groups have similar properties
In the Periodic table, horizontal rows are called
Periods
What are on th far left of the periodic table?
Reactive metals
What is on the far right of the periodic table?
Noble gases
They are extremely unreactive
Group 1 is on the far left of the Periodic table. As ŷou go down the group, they get…
More reactive.
Group 7 in the.Periodic table. Are next to the Noble gases. As you go down the group, they become
Less reactive
Give 3 examples of Noble gases
Helium
Neon
Argon
Give 3 examples of very reactive metals
Lithium
Sodium
Potassium
What is the symbol for potassium?
K
What is the symbol for sodium?
Na
In symbols, write out the compound, carbonate
CO3
3,is small. I can’t do it
Write out sulfate
SO4
What is the symbol for copper?
Cu
If 2 identical elements combine, is it a compound?
No
Mixtures are substances that are not
Chemically combined
Such as the gases in air
Describe a common way of making a mixture
Dissolving
