Answer:
Yes.....
Explanation:
<em> the decay half-life of a radioactive material can be changed. Radioactive decay happens when an unstable atomic nucleus spontaneously changes to a lower-energy state and spits out a bit of radiation. ... It is impossible to predict when an individual radioactive atom will decay.</em>
There are 3 significant digits in 5.40.
(To help understand): Sig figs are just a way of simplifying a number.
Answer:
yes it is true they apply necessary safety measures
Answer:
=16.49 L
Explanation:
Using the equation
P1= 0.6atm V1= 30L, T1= 25+273= 298K, P2= 1atm, V2=? T2= 273
P1V1/T1= P2V2/T2
0.6×30/298= 1×V2/273
V2=16.49L
vertical colums tell the valence and the horozontal rows tell the amount of rings that the electrons circle in.
It is easy to find this by simply looking at the Group # (these are the column numbers).
Elements in Group 1 all have 1 electron in their valence shell, Elements in group 2 have 2 and so on...
If you mean how many shells there are then look at the Period # this is the horizontal groups) the Period # corresponds with the number of electron shells.
Elements in Period 2 have 2 electron shells, elements in Period 3 have 3 and so on...