November history of periodic table

Question 1

He created a list of 33 elements organized in 4 categories:

Answer 1

1700s: Antoine Lavoiser

Question 2

Categories of Antoine Lavoiser

Answer 2

• Gas(light, heat, gas)
• Metals(silver, iron)
• Non-metals(pure charcoal)
• Earths(clay, magnesia, chalk)

Question 3

Chemical language of symbols.

Answer 3

1813: Jons Jabon Berzelius

Question 4

Law of triads, groups of three elements with similar properties.

Answer 4

1829: Johann Döbereiner

Question 5

Telluric helix: an arrangement of the elements in a spiral on a cylinder of increasing atomic mass.

Answer 5

1862: Alxandre Chancourtois

Question 6

Law of octaves: group of 8 elements with similar properties(mass)

Answer 6

1864: John Newlands

Question 7

Chemist of predictions. Demostrated a connection between atomic mass and elements properties.

Answer 7

Dimitri Mendelev

Question 8

Discovered that atoms contain a unique number of protons called “the atomic number”

Answer 8

1913: Henry Moseley

Question 9

Arranged the elements in order of increasing atomic mass.

Answer 9

1830: Lothar Meyer

Question 10

Is the QUANTITY OF ENERGY that an isolated gaseous atom in the ground electronic state.

Answer 10

ionization energy

Question 11

Is useful to DETERMINING many aspects of chemistry(distance from an atom’s nucleus to the outermost orbital of electron)

Answer 11

Atomic radii(radius)

Question 12

Is the change in energy of a neutral atom when an electron is added to the atom to form a negative ion.

Answer 12

Electron affinity

Question 13

Is a MEASURE of thr tendency of an atom TO ATTRACT a bonding pair of ELECTRONS.

Answer 13

Electronegativity

Question 14

Good conductors, high tensive strength, malleable

Answer 14

Metals

Question 15

Poor conductors, dull appearance, brittle

Answer 15

Non-metals

Question 16

Similar properties to metals and non-metals

Answer 16

Metalloids