Physical Science Ch. 5

The modern periodic table is organized by ___.

Elements of the same group share the same __.

When elements are arranged by atomic # elements with similar prop. appear at regular intervals

The ____ are reactive elements in Group 17 in the periodic table.

Why are alkali metals very reactive?

How does an atom become an ion?

Vertical columns of elements in the periodic table are called ___.

Group 18 noble gases are relatively inert because __.

Mendeleev first organized the elements by

Elements of the same group share the same number of __.

This family of elements is located in the center of the periodic table.

Mendeleev start a new _____ in his periodic table when properties repeated.

What did Mendeleev find when he organized the elements by atomic mass?

Which part of the periodic table are elements most metallic?

These are good conductors of heat.

Group I of the periodic table consists of ___ a highly reactive group of elements.

Group 1 elements lose an electron to form positive ions called a(n) ____.

These share the properties of both metals and non-metals.