Answer:
There are four ways to find the charge of an element:
Use the periodic table. The usual charge of an element is common to its group. ...
Use a chart. ...
For a single atom, the charge is the number of protons minus the number of electrons.
Find the charge by balancing charge in a compound
Answer:
The plum pudding model would have to be true as well because it shows that electrons are scattered within an atom.
Explanation:
I took the test and got it right :)
Answer:
D) burning a candle
Explanation
When burning a candle no new substance is form.
We have both physical and chemical change occuring.
Physical part: Melting of the solid wax and evaporation of the liquid forms the physical change.
Chemical part: burning of the wax vapour forms the chemical change.
Explanation:
The volume of the gas when the pressure of the gas increases to 755mm hg is calculated as follows
by use of boyles law formula that P1v1=P2V2
V2= P1V1/P2
V1=5.58 L
P1= 715 mm hg
P2=755 mm hg
V2 is therefore= ( 715 mm hg x 5.58 L) /755 mm hg= 5.28 L
C and D are correct. This is the process of replication, and option E refers to repetition.
