Transcript Twenty Questions

Twenty Questions
Atoms and Periodic
Table Review
Twenty Questions
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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.