Science Ch 17 Test Flashcards
Mendelev created an organized table of elements called the
Periodic table
Two elements with the same number of protons but a different number of neutrons are called
Isotopes
__________ is the weighted-average mass of all the known isotopes for an element
Average atomic mass
The positively charged center of an atom is called
Nucleus
The particles that make up protons and neutrons are called
Quarks
A ___________ is a horizontal row in the periodic table
Period
The ________ is the sum of the number of protons and neutrons in an atom
Mass number
In the current model of the atom, the electrons are located in the ________
Electron cloud
In which state of matter are most of the element to the left of the stair-step line in the periodic table
Gas
Liquid
Plasma
Solid
Solid
Which is a term for a pattern that repeats
Isotope
Metallic
Periodic
Transition
Periodic
Which of the following is an element that would have similar
Properties to those of neon
Aluminum
Argon
Arsenic
Silver
Argon
Which of the following terms describes boron
Metal
Metalloid
Noble gas
Nonmetal
Metalloid
How many outer- level electrons do lithium and potassium have
1
2
3
4
1
Which of the following is NOT found in the nucleus of an atom
Proton
Neutron
Electron
Quark
Electron
The halogens are located in which group
1
11
15
17
17
