Part TWO PS Quiz 4A

Match it! Select the correct answer from the pull down...Good luck!

Each period represents an _______ level.

The most striking features of Mendeleev’s periodic table were the _______ spaces that he left between some elements.

Scientists started to notice repeating patterns when they arranged the elements in order by increasing atomic mass. This repeated pattern is called _______.

Most importantly, each element in the group has the same number of ______ electrons, which are the electrons in the outermost energy level of a neutral atom.

The discoveries of gallium (31) and germanium (32) proved that Mendeleev was _________.

Moseley recognized that he was able to use a new technique called X-ray ________ to determine the atomic number for each element.

The spaces left blank in Mendeleev’s periodic table were for _______ elements that he predicted would be found in the future.

The arrangement of the _________ table relates to the structure of the atoms themselves.