Elements
element
Is breaking the bonds in a compound a physical or chemical change?
chemical
What element in is group 2, period 4?
Is KNO3 an element or a compound?
compound
Label all the atoms that are in the compound of LiAlSi2O6?
1 lithium
1 Aluminium
2 Silicon
6 oxygen
What element is the first in period 6?
Cessium
What is the main use of lithium?
rechargable batteries
Define compound
A substance made from two or more different types of elements chemically bonded to one another.
What is the atomic number of the element that is period 2, group 18?
10
Why is lithium mining been so relevant in the past 10 years?
As demand for rechargeable batteries increase, the need to obtain lithium abundantly and cheaply has increased too.
Lithium is extracted from brine as an element. True or False
False. It is extracted from brine as a compound and then needs to be isolated.
List all the elements in the molecule of caffeine: C₈H₁₀N₄O₂
8 carbon atoms
10 hydrogen atoms
4 nitrogen atoms
2 oxygen atoms
40
Positive - more lithium supply, less drilling
Negative - damage to ecosystems, slow, removes key water resource.
What is the heaviest element on the periodic table?
Oganesson
If the compound of H2O was used to create an H2 fuel battery, would the by-product be an element or a compound?
O2 would be left behind. It is an element
50
What is another element that may be able to replace lithium and why?
sodium
is in the same group on periodic table, therefore has similar physical properties.