Download Meet the Atom Answers

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Atom: a small particle that is the building block of matter
1. One million atoms will fit across the width of a hair.
2. The word atom comes from the Greek word meaning uncuttable or indivisible.
3. An atom is the basic building block of matter.
4. Are all atoms the same? NO
5. There are 92 different kinds of atoms in our world.
6. 98% of our universe is made of up hydrogen and helium
7. A substance made of only one kind of atom is called an element
8. Things that we can observe or measure about gold (and all matter) are called its properties.
9. We can see atoms with an electron tunneling microscope.
10. The properties of an element depend on which kind of atom it is made from.
11. The atomic number is connected to the number of positively charged particles called
protons.
12. Each atom has its own atomic number.
13. Chlorine’s shortened name cannot be “C” because carbon is already named “C”. So
Chlorine is written Cl
14. Gold is not written “G” or “Go”, but comes from the Latin word for gold (aurum). Its
shortened name is Au.
15. The shorthand way of writing elements is called the symbol of an element.