Vocabulary Review
Any substance that has mass and takes up space.
What is matter?
This is often expressed as half the distance between the nuclei of identical atoms that are bonded together.
What is atomic radius?
The energy required to remove an electron from a neutral atom.
What is ionization energy?
The relative attraction an atom has for the electron it shares in a molecule.
What is electronegativity?
A Russian chemist who published the first periodic table in 1869.
Who was Dmitri Mendeleev?
A species of atoms that have a given number of protons in their nuclei, including the pure substance consisting only of that species.
What is an element?
The plural form of radius.
What are radii?
This can be used to measure atomic radius.
What is x-ray imaging or spectroscopy?
A charged atom produced by removing an electron.
What is an ion?
Who was the British chemist that discovered a new periodic pattern based on nuclear charge, or the number of the protons in the nucleus?
Who was Henry Moseley?
A table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure appear in vertical columns.
What is the Periodic Table?
The pattern in atomic radius generally _______ down a group (column) and ______ across a period (row).
What is generally increases down a group and decreases across a period?
The pattern in ionization energy generally _______ down a group (column) and ______ across a period (row).
What is generally decreases down a group and increases across a period?
The pattern in electronegativity generally _______ down a group (column) and ______ across a period (row).
What is generally decreases down a group and increases across a period?
Their work requires "detective" work, careful analysis of samples, and the use of precise equipment to identify patterns.
What is an analytical chemist?
The number of protons in an atom's nucleus.
What is atomic number?
The reason why atomic radius generally increases with atomic number in each group of elements.
What is the number of occupied shells increases?
The trend of ionization energy in the periodic table compared with atmic radii. (same or opposite)
What is opposite?
The trend in electronegativity in the periodic table compared with the trend in ionization energy. (same or opposite)
What is the same?
Unreactive gases on the Periodic Table.
What are noble gases.