Answer the Q\'s in the spaces provided. Use the back page if necessary Give the
ID: 486803 • Letter: A
Question
Answer the Q's in the spaces provided. Use the back page if necessary Give the name and symbol of: a) an alkali metal: b) an alkaline earth metal: c) a halogen: d) a noble metal: e) a transition metal: f) a lanthanide element: g) an actinide element: h) an essential element: i) a man-made element: A chemist finds that 30.82 g of nitrogen will react with 17.60, 35.20, 70.40 or 88.00 g of oxygen. a) calculate the mass of oxygen per gram of nitrogen in each compound and show that the results are consistent with the Law of Multiple Proportions. (Please answer this question on the back) Suppose a beam of electrons travel through an electric field as shown below: ____* rightarrow beam of electrons _____ - a) in which direction will the beam move? Ans .:___ b) why? Ans .:_______ c) What would happen if the beam consisted of protons, neutrons or alpha -particles Ans.: __________________ d) why? __________________Explanation / Answer
Q2.
mass of O per gram of N required
1)
17.60/30.82 = 0.5710
35.2/30.82 =1.14211
70.40/30.82 = 2.2842
88/30.82 = 2.855
Apply rate:
1.14211/0.5710 = 2
2.2842/1.14211 = 2
2.855/2.2842 = 1.25
2.855/0.5710 = 5
As you can see, the proportions are conserved between some pairs:
Q3.
the beam of electrons is NEGATIVELY Charged, so it should be attracted to the positive field
If they were only protons-- they interact with the negtive plate
if neutrons --> no effect at all , just striahgt forward
alpha particle s--> +2 charge, will be similar than that of protons