C1-Atomic Structure and the Periodic Table Flashcards
(25 cards)
What type of substance contains two
or more elements chemically
combined?
Compound
What type of substance is made of
only one type of atom?
Element
What type of substance contains two
or more elements or compounds not
chemically combined?
Mixture
What is an atom with the same
number of protons but a different
number of neutrons?
Isotope
What is an atom that has lost or
gained an electron to become a
charged particle?
Ion
List the alkali metals in order of
increasing reactivity
Li, Na, K, Rb, Cs, Fr
What is the charge on a Group 1 ion?
1+
Why are group 1 elements called
alkali metals?
They react with water to make
alkaline solutions
Why does the melting point decrease
down the group?
Forces of attraction decrease the
bigger the size of the atom increases.
Less forces means less energy needed
to overcome the forces.
Why does reactivity increase as you
go down group 1?
Distance between nucleus and
outermost shell increases, shielding
increases and easier to lose
electrons
List the halogens ls in order of
increasing reactivity
F, Cl, Br, I, At
What is the charge on a Group 7 ion?
1-
What happens to the colour of the
elements as you go down group 7?
The elements get darker
Why can chlorine not displace
fluorine in a compound?
Fluorine is more reactive
Why does reactivity decrease as you go
down group 7?
Distance between nucleus and
outermost shell increases, shielding
increases and harder to gain electrons
What word means that an element
does not react with other elements?
Inert
Why is helium used in balloons?
Helium is less dense than air so it will float in air
What type of separation technique is
used to separate in insoluble solids
from liquid?
Filtration
What type of separation technique
requires a Liebig condenser?
Distillation
What is the equation to calculate Rf
value?
Rf = distance travelled by solute / distance travelled by solvent
State the charge of each sub atomic particle.
Proton = +1
Neutron = 0 (no charge)
Electron = -1
State the order of discovery of the
sub atomic particles
Electron
Proton
Neutron
What type of particle did Rutherford
fire at the gold foil?
Alpha particle
What did most of these particles do?
Passed straigh through the gold foil
