When lithium reacts with bromine to form the compound libr each lithium atom
(1) gains one electron and becomes a negatively charged ion
(2) gains three electrons and becomes a negatively charged ion
(3) loses one electron and becomes a positively charged ion
(4) loses three electrons and becomes a positively charged ion

(3) loses one electron and becomes a positively charged ion

Explanation:

Lithium bromide is formed by combination of lithium cation and bromine anion.

Electronic configuration of lithium:

Lithium atom will loose one electron to gain noble gas configuration and form lithium cation with +1 charge.

Electronic configuration of bromine:

Bromine atom will gain one electron to gain noble gas configuration and form bromide ion with -1 charge.

In lithium bromide, one electron from lithium metal gets transferred to bromine atom.

calculate how many grams of ammonia can be produced from 4.21 grams of

n2 + 3h2 = 2nh3

my answer:

25.0g n2 x (1 mol/ 28.0gn2) x (2 mol nh3/ 1 mol n2) x (17.0g nh3/ 1 molnh3) = 30.36g n2

25.0g h2 x (1 mol h2/ 2.00g h2) x (2 mol nh3/ 3 mol h2) x (17.0g nh3/ 1 mol nh3) = 141.67g h2

lr = n2

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.