1. Atoms and the Periodic Table
Clicker Review Take the clicker that matches your number on the list (see first lab table)!

2. An atom is electrically neutral because
protons & electrons have opposite charges.
the charge of protons is balanced by the charge of neutrons.
the number of protons is equals the number of electrons.
Both a and c.

3. The electrons are found in
shells or energy levels.
electron clouds.
with the neutrons in the nucleus.
both A & B.

4. The nucleus of the atom contains
only neutrons.
most of the mass of the atom.
electrons and protons.
electrons and neutrons.

5. The order of elements in the periodic table is based on
the number of protons.
the number of electrons.
the number of neutrons.
the average atomic mass.

6. All elements in the same group have the same number of _____ and all elements in the same period have the same _____.
number of shells; oxidation number.
valence electrons; oxidation number.
valence electrons; number of shells.
shells; number of valence electrons.

7. Carbon and other nonmetals are found in which area of the periodic table?
on the left side
on the right side
in the middle column of the periodic table
in the bottom rows

8. What is the charge of an electron?
Negative
Positive
Neutral

9. Where are the electrons with the most energy?
Closest to the nucleus
Furthest from the nucleus
In the middle shells
They all have the same energy no matter where they are located.

10. The order of the periodic table is based on the
number of protons
number of neutrons
atomic mass
charge of the nucleus

11. Atoms of elements that are in the same group have the same number of
protons
neutrons
valence electrons
mass

12. Valence electrons tell us an atom’s
mass
reactivity
charge
period

13. Which of the following elements is an alkali metal?
Calcium - Ca
Magnesium - Mg
Mercury - Hg
Sodium - Na

14. Why are alkali metals so quick to react?
They have small masses.
They are soft solids at room temperature.
They give away their 1 valence electron so their next shell has 8.
They aren’t quick to react.

15. When Chlorine (Cl) reacts, it steals an electron
When Chlorine (Cl) reacts, it steals an electron. What does this do to the atom?
Cl +1
Cl -1
Cl +8
Cl 0

16. Noble gases don’t react because
they become positive in the air.
they become negative in the air.
their outer shells are already full.
they are gases.

17. What is the family of Iron (Fe)
Alkali metals
Alkaline Earth metals
Rare-earth metals
Transitional metals

18. What is the family of Chlorine (Cl)?
Halogen family
Oxygen family
Transitional Metals
Noble gases

19. What is the family of Calcium (Ca)?
Transitional metals
Alkali metals
Alkaline earth metals
Rare-earth metals

20. Is Silicon (Si) a metal, nonmetal, or metalloid?
None of the above

21. What is the family of Phosphorus (P)?
Noble gases
Halogens
Nitrogen family
Carbon family

22. What is the family of Hydrogen (H)?
Alkali metals
Noble gases
Rare-earth
Not in a family

23. What is the most reactive metal?
Fluorine (F)
Francium (Fr)
Lithium (Li)
Uranium (U)

24. What is the magic number in chemistry? Why?

25. With a partner, match what each scientist or theory believed about atoms.
1.Democritus (Greek) A. Atoms of same element are
2.Dalton alike
3.Thompson B. electrons orbit like planets
4.Rutherford C. there must be a nucleus
5.Bohr D. 1st to name electrons
6.Modern Theory E. electrons in clouds; can’t locate
F. first to name atoms, but thought indivisible

26. Drawing Atoms 1. Symbol 9. Group? 2. atomic number 10. Family?
3. mass number 11. Solid, liquid, or gas?
4. # protons Metal, nonmetal, or metalloid?
5. # electrons 13. Which element would it react with?
6. # neutrons 14. Why would it react with that element?
7. # shells (clouds) 15. Draw an atom of the element.
8. # valence electrons