Suspensions
Solutions
Colloids
States
Miniscus
100
Which subatomic particle has a positive charge?
Proton
100
All atoms of the same element contain the same number of ____________________.
Protons
100
Which subatomic particle has no electric charge?
Neutron
100
The ______________________of an element is the number of protons and neutrons in the nucleus.
mass number
100
What is the smallest particle in which an element can be divided and remain the same substance?
Atom
200
Elements in the same vertical column on the periodic table belong to the same_________________.
group (or family)
200
Elements in the same horizontal row on the periodic table belong to the same__________________.
period
200
If an atom has 29 protons and 35 electrons what is it's electrical charge?
It is a negatively charged ion
200
What is the sum of the protons and neutrons called?
mass number
200
(T/F) The date that each element was discovered is included on the periodic table.
False
300
How is Moseley's basis for arranging the elements different from Mendeleev's?
Moseley arranged elements by increasing atomic number. Mendeleev arranged the elements by increasing atomic mass.
300
Most of the elements on the periodic table can be characterized as_______________________.
metals
300
The center of an atom is called the___________________.
Nucleus
300
Metalloids can also be called_________________.
semiconductors
300
Who goes down in history as the father of the atomic theory?
John Dalton
400
Which subatomic particle has the least mass?
electron
400
The discovery of which particle proved that the atom is divisible?
electron
400
Mendeleev's periodic table was useful because___________.
It allowed for the prediction of missing elements.
400
How is the periodic table like a calendar?
Both are periodic. The periodic table has repeating properties of elements. The calendar has repeating days and months. (PATTERN)
400
What are the atoms that have the same number of protons, but a different number of neutrons called?
isotopes
500
How many protons does an atom with an atomic number of 23 and a mass number of 51 and it is not an ion?
23
500
How many electrons does an atom have if the mass number is 247 and there are 96 protons and it is not an ion?
96
500
What is the atomic mass (mass number) of an atom if it has 101 protons and 157 neutrons and is not an ion?
258
500
What is the atomic mass (mass number) of an atom if it has 30 protons and 35 neutrons and is not an ion?
65
500
How many neutrons does an atom have if the mass number is 169 and it has 69 electrons?
100
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