Vocabulary
Chemical Symbol
Facts
Elements
More Facts
100
the positively charged particle in an atom
What is a proton?
100
O
What is the chemical symbol for oxygen?
100
Metalloids have properties of both metals and nonmetals.
What is a metalloid?
100
conductors
Metals are good _____.
100
The nucleus is the core of the atom. It is composed of protons and neutrons.
What is found in the nucleus?
200
the number of positively charged protons in the nucleus
What is atomic number?
200
H
What is the chemical symbol for hydrogen?
200
A proton is a positively charged particle; a neutron is neutral; an electron is a negatively charged particle.
What is the difference between a proton, neutron and electron?
200
stable
Elements in the noble gases tend to be _____.
200
7 periods 18 groups 113 elements
There are ___ periods in the Periodic Table. There are ____ groups and ______ elements.
300
a chart that groups elements with similar properties in columns
What is a Periodic Table?
300
Na
What is the chemical symbol for sodium?
300
Dmitri Mendeleev
Who invented the Periodic Table?
300
reactive
Elements in the family called alkaline earth metals are very _________.
300
A proton has a relative mass of 1 amu and it takes about 2000 electrons to weight the same relative mass as a proton. An electron weighs 1/1836 amu.
What is the difference in relative mass between a proton and an electron?
400
the smallest part of an element that carries the properties of the element
What is an atom?
400
Ag
What is the chemical symbol for silver?
400
Isotopes are atoms of the same element with a different number of neutrons.
What is an isotope?
400
metals
_____ are the most common elements on the Periodic Table.
400
Columns are referred to as groups and the rows are referred to as periods.
What is the difference between columns and rows on the Periodic Table?
500
the number of protons plus the number of neutrons in an element; the weight of the element
What is the atomic mass?
500
Au
What is the chemical symbol for gold?
500
They are ordered by their atomic structure and organized according to their atomic number.
How are elements on the Periodic Table organized?
500
left side- metals right side- nonmetals
The elements to the left side of the bold line are _______ and the elements to the right side are _____________.
500
Atomic mass is the number of protons plus the neutrons. Atomic number is the same number as the number of protons and the number of electrons
How do you find the atomic mass and the atomic number of an element?
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