Answer:
___________________________________________________
" 2 Li + Br2<span> ----> 2 LiBr " .
___________________________________________________</span>
Answer:
They represent the valence electrons, so s and p sublevels only! This does not include the d block!
Answer:
its D I'm pretty sure because it's from high heat/pressure
Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.
Answer:
90yrs
Explanation:
Half life is the time taken for half of an original radioactive material to decay by half.
For the sample;
Half - life = 45yrs
Original amount = 600cpm
Start Number of atoms
0yrs 600cpm
First half life
45yrs 300cpm
Second half life
90yrs 150cpm