Chemistry Flashcards
(30 cards)
He is the Russian scientist who designed the periodic table
Dmitri Ivanovich Mendeleev
In Greek mythology Kronos used a scythe made adamantine to chop his father, Ouranos into tiny pieces. In the present, adamantine is considered as the hardest substance in earth. What is another name for adamantine?
Diamond
The first metal used by a man
copper
Mercury has a symbol of Hg in the periodic table. It is derived from its Latin name which is
Hydrargyrum
The most malleable metal is
Gold
What is the chemical name of baking soda?
Sodium bicarbonate
The famous pesticide
DDT was banned in 1923 because of its harmful effects to human health. What does the acronym
DDT stands for?
Dichlorodiphenyltrichloroethane
Element symbol of Samarium
Sm
the sun and sky appear a red color during sunsets. The phenomenon by which the gas molecules selectively scatter shorter wavelengths of light is called .
Rayleigh scattering
Is a gauge that measures instantaneous speed
Speedometer
A projectile launched at 45° will attain the
Greatest change
What is the chemical name of NH4+
Ammonium
What is the chemical name of CrO4²-
Chromate
What is the chemical name of NO2?
Nitrogen Dioxide
Acetate can be shown as C2H3O2- or CH3COO-
True
What is the chemical name of CO3²-
Carbonate
OH- can be described as which polyatomic ion?
Hydroxide
What is the chemical difference between sulfate and sulfite?
Sulfate has one more oxygen than sulfite
What are the substances that enter a chemical reaction called?
Reactants
What are the substances that are the result of a chemical reaction called?
Products
What is the bond called that occurs between nonmetals and nonmetals?
Covalent bond
An atom is considered to be _______ when the number of protons and electrons are equal.
Neutral
Which chemical reaction occurs when energy is released?
Exothermic
What part of the atom is involved in chemical bonding?
Valence electrons
