Course Outcome 2 Flashcards
(27 cards)
Arranged the elements by their valency.
Lothar Meyer / Meyer
His Law of Octaves, every eight element showed similar properties when arranged in increasing atomic masses.
John Alexander Reina Newlands / Newlands
He organized the chemical elements in order of increasing atomic weights.
Alexandre-Emile Beguyer de Chancourtois / Beguyer
He arranged the table in increasing atomic number.
Henry Moseley / Moseley
He arranged the elements by atomic mass.
Dmitri Mendeleev / Mendeleev / Dmitri
As of 2018, the modern periodic table has ___ elements officially recognized by the International Union of Pure and Applied Chemistry (IUPAC)
118
He arranged the elements with similar properties into a group of three. He called these groups ‘triads.’
Johann Wolfgang Döbereiner / Wolfgang / Döbereiner
The ____ on the periodic chart are periods.
Rows
Elements in the same group have similar chemical properties. _________ are groups.
Columns
Arrange the following in decreasing atomic radius or size: Calcium, Beryllium, Magnesium, Barium.
2, 4, 3, 1. / 2431 / Second, Fourth, Third, First.
Arrange the following in decreasing atomic radius or size: Calcium, Beryllium, Magnesium, Barium.
2, 4, 3, 1. / 2431 / Second, Fourth, Third, First.
Size of an atom when it is an ionic particles.
Ionic Radius
_______ is smaller than the parent atom.
Cation
_______ is bigger than the parent atom.
Anion
Ability of an atom in a chemical bond to attract electrons toward itself.
Electronegativity
The theory that the atom is the smallest
fundamental particle of an element that exhibits the property of the
element.
Atomic Theory
The idea that things are made up of
much smaller things that cannot be
changed nor divided
Atomism
His ideas about atoms was introduced in 1803.
John Dalton / Dalton
Enumeration:
What are the 3 laws of matter.
(no exact order)
Law of conservation of mass
Law of definite proportions
Law of multiple proportions
What law of matter is this: The proportion of elements in any compound is always the same.
The Law of Definite Proportions
What law of matter is this: Matter cannot be created nor destroyed, it can only change forms.
The Law of Conservation of Mass
If two elements combine to form different compounds, the ratio of masses of the second element that react with a fixed
mass of the first element will be a simple whole numbered ratio.
The Law of Multiple Proportions
Atoms with the same atomic number but different mass numbers.
Isotopes
An atom or groups of atoms that has lost one or more electrons, making it positively charged, or gained one or more electrons, making it negatively charged.
(BF NI VICE)
Ions
