Twenty Questions

Atoms and Periodic Table Review

Twenty Questions

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6 7 8 9 10

11 12 13 14 15

16 17 18 19 20

1. What subatomic particles are found in the nucleus of an atom?

Protons and Neutrons

Where are electrons found?

Electron Cloud

3. Protons have a _____ charge.

positive

4.Neutrons have ___ charge.

no

5.Electrons have a ____ charge.

negative

6.How do you find the atomic mass of an atom?

Add the protons and neutron

7.The number of protons in the nucleus is the ____ of an atom.

Atomic number

8.What is the mass number of an atom that has 4 protons, 4 electrons, and 3 neutrons.

7

9. An atom has no overall charge because it has equal number of __ and ___.

Protons and electrons

10.How many protons does an atom with an atomic number of 23 and a mass number of 51 have?

23

11. What determines the identity of an element?

Atomic number

12. Isotopes exist because atoms of the same element can have different number of ___.

neutrons

13. What is the significance of the zigzag line on the periodic table?

It divides the metals from the nonmetals.

14. You find metals on the ___ of the zigzag line.

left

15. You find nonmetals on the ___ of the zigzag line.

right

16. Rows that run horizontally are called___

periods

17. Columns that run vertically are called___.

Groups or families

18. The ___ corresponds to the number of energy levels an atom has.

Period number

19. Elements in the same ___ share similar properties.

Group or family

20. How many valence electrons does an atom of the element have that is in group 18 have?

8.