Transcript Chapter 12 Science Study Guide

Science Study Guide
Chapter 12
Structure of Matter
Ch. 12 Word Bank
• Chemical formula
metals periodic table
• Noble gases
neutrons compound
groups
Chemical symbols
• protons
• 1. ______________ use chemical symbols
and numbers to show the kinds and numbers
of atoms in a compound.
• Answer: Chemical formulas
• 2. ________ are usually shiny and bendable.
• Answer: Metals
• 3. Elements are arranged by the properties in
the _______________.
• Answer: periodic table
• 4. _____________ are elements that rarely
combine with other elements to form
molecules.
• Answer: Noble gases
• 5. An element’s _____________ is an
abbreviation of its name, sometimes from
Latin or Greek.
• Answer: chemical symbol
• 6. A _____________is made of two or more
elements that are combined chemically.
• Answer: compound
• 7. _______________ and ____________ are
particles found in the dark region in the
atomic model.
• Answer: Protons
neutrons
• 8. All atoms of an element have the same
number of _____ in their nuclei.
• protons
• 9. A ______________ requires a chemical
reaction to form.
• Answer: compound
• 10. In the periodic table, a column is called a
__________________.
• Answer group
• 11. Carbon substances can have very
different properties because ____________
____________________________________
____________________________________.
• Answer: carbon atoms can be arranged in
different ways.
• 12. List 3 properties of metals ___________
____________________________________
____________________________________
• Answer: shiny, reflect light, bendable,
stretchable, and able to conduct electricity
and heat.
• 13. If one of the elements in table salt is a
metal, why doesn’t it look or feel like metal?
____________________________________
____________________________________
• Answer: Compounds have different
properties than the elements that make
them up.
• 14. Why are compounds called “pure
substances”? _______________________
___________________________________
• Answer: Every molecule in a compound is
like every other molecule and has the same
properties.
True or False
• 15. True or False: The chemical formula for
a water molecule is HO2.
• Answer: False H2O
• 16. True or False: Each molecule in a
compound acts identically to every other
molecule of that compound.
• Answer: True
• 17. True or False: Water is a compound
made up of the two elements.
• Answer: True
• 18. True or False Rust is an element of iron
and oxygen called iron oxide.
• Answer: False Rust is a compound
• 19. How many hydrogen atoms are there in a
sucrose (C12H22O11) molecule? _________
• Answer: 22
• What compound is produced when almost
anything containing carbon is burned and is
released by your lungs when you exhale?
• Answer: carbon dioxide (CO2)
Bonus
• Besides color name 2 physical properties that
could be used to tell the differences between
2 metals.
Bonus
• 2. Explain how rust forms and why rust
cannot be washed off.