9.1
The f-block elements are known as the ___.
Inner Transition metal
The columns in the periodic table are known as
Group
The periodic table has 114 elements
True or False
False - 118 elements
What is the term for metals, metalloids, and non-metals in group 1-2 and 13-18?
Representative elements
Using the periodic table, the element whose electron configuration ends in 4s is__.
a. Ca
b. Li
c. Mg
d. Na
a. Ca
The elements of Group 2 of the periodic table are called____
Alkaline-earth metals
Elements under___ are known as halogens which are the most reactive nonmetals
Group 17
He arranged the elements based on their increasing atomic number rather than atomic mass.
Moseley
The term Halogen means
Salt-forming
The properties of being generally hard, lustrous, malleable, ductile, and readily conduct electricity are common to___.
Metals
Who observed that when the elements were arranged according to their increasing atomic weights, every eight element had properties similar to each other
Newlands
What do you call elements that share the same properties of metal and non-metals
Metalloids
He is the chemist who noticed that certain groups of elements having similar properties seemed to come in groups of three, such that the atomic mass of the middle element was approximately equal to the average mass of the heaviest and the lightest ones.
Dobereiner
Who organized the elements into a table in the order of their atomic masses, with the elements that exhibit similar properties appearing next to one another?
Mendeleev
Which of the following groups that not represents a family
a. As, Se, Br, Kr
b. B, Al, Ga, In
c. Cr, Mo, W, Sg
d. N, P, Sb, Bi
a. As, Se, Br, Kr