CGTC FAQs: Academic Support

1.  Together, just four elements make up more than 95 percent of the body's mass.  These include ___________.  

A. calcium, magnesium, iron, and carbon

B.  oxygen, calcium, iron, and nitrogen

C.  sodium, chlorine, carbon, and hydrogen

d.  oxygen, carbon, hydrogen, and nitrogen

2.  The smallest unit of an element that still retains the distinctive behavior of that element is an ____________.

A.  electron

B.  atom

C.  elemental particle

D. isotope
 

3.  The characteristic that gives an element its distinctive properties is its number of _____________.

A.  protons

B.  neutrons

C. electrons

D.  atoms

4.  On the periodic table of the elements, mercury (Hg) has an atomic number of 80 and a mass number of 200.59.  It has seven stable isotopes.  The most abundant of these probably have _____________.

A.  about 80 neutrons each

B.  fewer than 80 neutrons each

C.  more than 80 neutrons each

D.  more electrons than neutrons

5.  Nitrogen has an atomic number of seven.  How many electron shells does it likely have?

A.  one

B.  two

C.  three

D.  four

Answers

1.  D

2.  B

3.  A

4..  A

5.  B