NOVA: Hunting the Elements Worksheet Name: _____________________________
CHEM 280 Week 5
1. Every nucleus contains __________________ and its number of ___________________ that determines what kind of element the atom is.
2. The number of protons is called the atomic _________________ and it’s the fundamental organizing principle of every table of the elements
3. Two rows above gold is the metal: ________________; its symbol is: ___________________.
4. Which subatomic particles determines an elements reactivity? ______________________?
5. Humans (& all living things) are made up of mainly which elements __________________________ that make up 97% of the weight of the body. But what about the other 3%? Those are what’s called the _____________________ elements.
6. Which isotope of carbon is used to determine the age of ancient remains? __________________.
7. Atoms of plutonium have ___________ protons and _______________ electrons
8. The first man-made alloy (bronze) is composed of what two elements? __________________ and _________________.
9. Although most people think of silicon as the main ingredient in silicon chips that have fueled the electronic age, what was its main use for hundredth of years before this? Explain
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10. Why noble gases are stable? Explain
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