Group 1 elements in periods 2-7 all react with water, but with increasing reactivity from period 2 through 7. This because the Li has 2 valence electrons, and Fr has 7 valence electrons.
O True
O False
PLEASE HELP PLEASE IM TAKING A TEST

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

i need with 1.3.2 investigate cycling o2 and co2 apex

we need to see it