考古学家是通过测定古生物遗骸中碳-14含量来推断它的生活年代．下列关于碳-14原子的说法中，错误的是（ ）
A．中子数为6
B．质子数为6
C．电子数为6
D．质子数和中子数之和为14
A、核电荷数=质子数，核电荷数为6，则质子数为6；相对原子质量为14，则中子数为14-6=8，故选项说法错误．
B、根据核电荷数=质子数，碳-14原子的核电荷数为6，则质子数为6，故选项说法正确．
C、根据核电荷数=质子数=核外电子数，碳-14原子的核电荷数为6，则电子数为6，故选项说法正确．
D、根据相对原子质量=质子数+中子数，相对原子质量为14，故质子数和中子数之和为14，故选项说法正确．
故选A．
| 阅读理解。 | ||||||||||
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| 1. Thomas Edison is from __ | ||||||||||
| A. Canada B. Italy C. the USA D. China | ||||||||||
| 2. The __ was born in 1770. | ||||||||||
| A. musician B. nurse C. businessman D. scientist | ||||||||||
| 3. Business@ the Speed of Thought is the name of a_______. | ||||||||||
| A. song B. book C. school D. film | ||||||||||
| 4. Nightingale died in __ | ||||||||||
| A. 1931 B. 1827 C.1847 D. 1910 | ||||||||||
| 5. Which of the following is TR UE ? | ||||||||||
| A. Yao Ming is playing basket ball in America. B. Beethoven made over l,000 inventions. C. Edison was born in 1820. D. Bill Gates worked in Microsoft in 1955. |
