posted by lalt .
How many atoms of each element are in this compound? MgBr2
A. 2 magnesium atoms and 2 bromine atoms
B. 2 magnesium atom and 2 bromine atoms
C. 2 magnesium atoms and 1 bromine atom
D. 1 magnesium atom and 2 bromine atoms
What is your problem here? The subscripts (or what passes for subscripts) tell you how many atoms are there.
Its D..!!...the 2 after the Br means its attached to that element..so read as 2 X Br....there is nothing after the Mg...so that means there ais only one
So therefore its D...