Atoms, Molecules & Elements - Grades 5 to 8 - Print Book - Lesson ... - Free Printable

Final Answer:
1. a) F
b) T
c) F
d) T
e) F
f) F
2. bonds → c
chemical → b
electrons → a
elements → d
protons → e

Comprehension Questions:
1. a) C (about 100)
b) D (they all have the same number of electrons)
c) A (none)
2. a) helium, hydrogen, iron
b) air, sunlight, water

Short Answer Questions:
3. An element is a pure substance made of only one kind of atom.
4. Hydrogen is the simplest element.
5. Oxygen and carbon (or any two correct elements).
6. Lithium has 3 electrons circling its nucleus: 2 in the inner circle and 1 in the outer circle.