periodic TABLE Flashcards
why is postassium more reactive the sodium
because its outermost electron is further away from the nucleus due to an additional electron shell, making it easier to remove and thus requiring less energy to ionize
lithium oil
changes form shiny to dull
universal indicator
Lithium hydroxide is formed and the solution is an alkali
number used to show the periods in this diagram
2,3,4,5
which element in the diagram is the least reactive
argon bc it has a full other shell of electrons so it cant react
why is the electronic configuration of Na and Rb similar
they both have an outer shell with one electron as they are both group one elements
why is Na a metal (physical property)
good conductor of electricity
which substance is a mixture
air
squeay pop when ignited which gas
Hydrogren
substance that is a green gas at room temp
chlorine
elements added to trough
cant dissolve
both float
one observation from trough B
reacts with water to produce gas
2Li + 2H2O–>
2LiOH + H2
chemical reaction for hydrogen and bromine
H2 + Br2 —> 2HBr
Write a chemical equation for chlorine and potassium bromide?
Cl2 + 2KBr —> 2KCl + Br2
explain the reaction that occurs 4 mark question
displacement reaction
chlorine displaces bromine as chlorine is more reactive
bromine causes the final colour
the solution turns orqange
they are both in group 7 the Halogens
the chlorine bubbles
fume cupboard
bc halogens are toxic
hemical equation of caesium with water?
2Cs + 2H2O —> 2CsOH + H2
