twenty questions atoms and periodic table review
TRANSCRIPT
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.