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10th - Ch 4 Exm Q's

10th Gr 2015 Ch 4 Exam Q's

QuestionAnswer
What are the characteristics of an atomic nucleus? contains protons and neutrons, has positive charge
What is the charge of an electron? negative 1
Why does an atom have zero overall charge? the number of protons and electrons is equal
What changes about an atom when it becomes an ion? its number of electrons
According to the Bohr model, What do electrons in an atom behave like? planets orbiting the sun
What is the name of the current model of electrons? electron cloud model
What is the same about different elements in the same group? the number of valence electrons
What does the atomic number of an element represent? the number of protons in the nucleus of that element
Can you choose the alkali metal from a list? Na, K, and Li are all alkali metals (group 1)
In what area of the periodic table are nonmetals located? the right side
What is a horizontal row across the periodic table called? a period
What are elements in group 17 called? halogens
What are elements in group 18 called? noble gases
How many neutrons in oxygen-17? 9
What do isotopes of the same element have in common, and how do they differ? Same atomic number, different atomic mass.
What is mass number? the number of protons plus neutrons in a nucleus
What is the term for outermost energy level electrons? valence electrons
What do valence electrons determine about an atom? chemical properties
What is the maximum number of valence electrons any atom can have? 8
If a 16-oz bottle of water costs $1.44, what is the price per ounce? $0.09 / oz
Created by: gstubblefield