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Science Periodic Table
Grade 6
36
Science
6th Grade
04/06/2022

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Term
The sum of the number of protons and neutrons results in an atom's approximate _______ .
Definition
Atomic Mass
Term
The scientist that developed the Periodic Table of the Elements.
Definition
Dmitri Mendeleev
Term
What is the chemical name for the element represented by the chemical symbol H?
Definition
Hydrogen
Term
A substance that contains only one kind of atom is called an .
Definition
element
Term
Copper is a chemical element with which symbol?
Definition
Cu
Term
Why is water NOT on the periodic table?
Definition
It is a compound, not an element
Term
_______ are the ROWS (run horizontally) on the periodic table.
Definition
periods
Term
_______ are the COLUMNS on the periodic table and are organized by similar
Definition
Groups
Term
As you move from left to right across the periodic table, the atomic number increases.
Definition
True
Term
How many PERIODS (horizontal rows) a periodic table has?
Definition
7
Term
How many groups ( vertical columns) a periodic table has?
Definition
18
Term
What is the cloud model?
Definition
Electrons move rapidly within a cloudlike region around the nucleus
Term
What are Lanthanides and Actinides and where are they found on the periodic table?
Definition
Rare earth metals they are found at the bottom of the periodic table
Term
Alkali Metals
Definition
The metals of Group 1. metals are so reactive that they are never found as free elements in nature. They are found only in compounds
Term
Alkaline Earth Metals
Definition
The metals of group 2. These metals are harder and denser and they melt at higher temperatures.
Term
Transition Metals
Definition
The elements in Group 3 through 12. Most of these metals are hard and shiny solids with high melting points. such as iron, copper, nickel and gold.
Term
The Boron family
Definition
Group 13. High strength and lightweight
Term
The Carbon family
Definition
Group 14. is Non metal
Term
The Nitrogen Family
Definition
Group 15 contains two nonmetals Nitrogen and Phosphorus and two Metalloids Arsenic and Antimony.
Term
The Oxygen Family
Definition
Group 16 contains three non-metals Oxygen, sulfur, and Selenium, and two metalloids Tellurum and Polonim
Term
Hydrogen
Definition
Alone in the upper left corner of the periodic table
Term
the Halogen Family
Definition
Group 17 contains the nonmetals fluorine, Chlorine, Bromine, and Iodine.
Term
The Noble gases
Definition
Group 18. Helium is in this group
Term
which two elements are nanowhiskers made of?
Definition
Carbon and Silver
Term
atoms
Definition
smallest particle that is an element
Term
Nucleus
Definition
Dense center of an atom
Term
Proton
Definition
+ charge in an atoms nucleus
Term
John Dalton
Definition
English chemist who conducted many experiments centered on atoms.
Term
J.J. Thompson
Definition
discovered that atoms contain negatively charged particles
Term
Ernest Rutherford
Definition
found that the atom is mostly empty space but has a dense postie charge at its center
Term
Niels Bohr
Definition
Danish scientist. He suggested that electrons move only in specific orbits around an atom's nucleus
Term
Atomic number
Definition
number of protons in the nucleus on an atom
Term
How many elements are radioactive
Definition
37
Term
How many elements are in the periodic table
Definition
118
Term
families
Definition
group of related things
Term
Why do scientists create models of atoms to describe them?
Definition
because atoms are so tiny and difficult to study
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