Biology, 29.08.2019 17:00 jess7kids98
An element can have multiple isotopes. each of the different isotopes of the same element has a different:
a. number of electrons
b. number of protons
c. mass number
d. atomic number
Answers: 1
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Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.
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Explain why phospholipid molecules form a bilayer. (3 marks)
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The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above
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