The order of elements in the periodic table is based on
Atoms of elements that are in the same group have the same number of
Which of the following elements is an alkali metal?
In Mendeleev's periodic table, elements in each column had similar
How was Mendeleev's periodic table arranged?
Mendeleev left gaps in his periodic table because
Each column of the periodic table is
The three main groups of elements are metals, nonmetals, and
Most elements are
Elements in an elemental family have similar
The order of elements in the modern periodic table is based on an element's
Which statement about the alkali metals is correct?
Metals tend to be
Which group is very stable due to the fact that they have a full outermost energy level?
Which of the following is a property of group 18 elements?
Based on its location on the periodic table, which of these elements most likely has physical and chemical properties most similar to boron (B)?
Which of the following groups on the Periodic Table is likely to form positively charged ions (or cations)?
Which of the following elements would most likely be a shiny, gray-colored solid at room temperature, conduct electricity, and dent when hit with a hammer?
Alkali metals are extremely reactive because they