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Most elements are ___________.
What are metals.
Group 17 elements form which type of ions?
What are anions.
What is the number of protons in the nucleus (atomic number)
Most halogens form compounds by doing what?
What is gaining an electron to form a negative ion.
Atoms of elements that are in the same group have the same number of ___________.
What is valence electrons.
Atoms that gain or lose electrons are called _____.
What are ions.
Elements in an element family have similar ______.
What is chemical properties.
In Mendeleev's periodic table, elements in each column had similar __________.
What are properties.
Mendeleev left gaps in his periodic table because ____________
What is no known elements fit there
Most elements on the left side of the periodic table are ____________.
What is metals.
What is ionization?
What is the losing or gaining of electrons.
Why is sodium highly reactive?
What is it has one valence electron.
What is Mendeleev known for?
What is publishing the first periodic table.
As you move from left to right across the periodic table, elements .....
a.) have a lower atomic number
b.) become more metallic
c.) become less metallic
d.) have a lower atomic weight
What is b.) become more metallic
Elements that share properties of both metals and nonmetals are called ___________.
What is semiconductors (metalloids)
Transition metals such as copper form compounds by:
a.) losing neutrons
b.) gaining electrons to form negative ions
c.) losing electrons to form positive ions
What is c.) losing electrons to form positive ions.
Why do noble gases exist as single atoms rather than as molecules?
What is they are nonreactive due to having a full outer energy level.
In Mendeleev's version of the periodic table based his arrangement of of the elements on __________
What is atomic mass
elements that have one valence electron tend to ______
What is form ions, be highly reactive, and become charged.
What is the alkali metals (Group 1)
Which of the following has a larger atomic radius?
a.) K
b.) Ra
What is b.) Ra
Which semiconductor is found in computer chips?
What is silicon
Which atom is the most electronegative on the periodic table?
What is F (Fluorine).
The law that states that elements that have similar properties appear at regular intervals is called the ___________ law.
What is the periodic law.
What is the only nonmetal in Group 1?
What is hydrogen