下图A是某元素在元素周期表中的相关信息， B是其原子结构示意图。

（1）该元素的相对原子质量为       ；

（2）该元素属于         元素（选填 “金属”或“非金属”）；

（3）该原子在化学反应中容易       电子（选填 “得到”或“失去”）。

"This company will not be training any more pilots in the foreseeable future, since we have 400 trained pilots on our waiting list who are seeking employment. The other five major companies each have roughly the same number of trained pilots on their waiting lists, and since the projected requirement of each company is for not many more than 100 additional pilots, there will be no shortage of personnel despite the current upswing in the aviation industry. "
Which one of the following, if true, casts the most doubt on the accuracy of the above conclusion

A．Most of the trained pilots who are on a waiting list for a job are on the waiting lists of all the major companies.

B．In the long run, pilot training will become necessary to compensate for ordinary attrition.

C．If no new pilots are trained, there will be an age imbalance in the pilot work force.

D．The quoted personnel projections take account of the current upswing in the aviation industry.

E．(E) Some of the other major companies are still training pilots but with no presumption of subsequent employment.