Atoms
The SI units for measuring mass, length and temperature are___________
what is Kilogram, Meter, Kelvin
Which of these pairs of atoms are Isotopes?
Chlorine-35, Chlorine- 51
Scandium-46, Titanium-46
Sodium-24, Magnesium-24
Iron- 56, Sodium- 24
what is chlorine-35 and chlorine 51
Most atoms gain, lose, or share electrons to end up with how many valence electrons
what is 8
What is a solute?
What is the substance that dissolves in a solvent
A catalyst is __________.
A chemical that speeds up a reaction
Which value is equivalent to 5 x 10^6 ?
An atom of Chlorine has an atomic number of 17 and a mass number of 37. How many protons, neutrons and electrons are in the atom
17, 18, 17
Ionic bonds form between
what is a metal and a nonmetal
How does raising the temperature of a solvent affect solubility of a solid?
What is the solubility increase
Is H20 an element or a compound?
What is Compound
Michael wants to know if the type of gasoline used in a car effects how fast the car will drive. He is designing an experiment to collect evidence for his question. What is the independent variable?
What is The type of gasoline
The atomic number tells us how many __________ an element has in its nucleus.
what is protons
A _____ reaction is a process in which some substances change to other substances as chemical bonds break and reform.
Which of these is a chemical change?
A melting ice cube
Water becoming water vapor
An apple rotting
Dissolving salt in water
What is an apple rotting
Which particle has the lightest mass
What is Electron
A covalent bond in which the electrons are shared unequally is
What is a polar bond
What physical property makes a metal able to be shaped
what is malleability
When compounds such as sugar Break up into individual molecules in the water you have a
What is molecular solute
A chemical ________ is a written method of representing the changes that occur in a chemical reaction.
What is equation
Add using scientific notation (5.2 x 10^7) + (3.01 x 10^4)
What is 5.20301 x 10⁷
Argon and chlorine are both nonmetals. Argon exists in nature as individual argon atoms. Chlorine exists in nature as two chlorine atoms covalently bonded to each other. Why does this occur?
An argon atom is already stable with eight valence electrons, but a chlorine atom must share two electrons with another chlorine atom to reach eight valence electrons and become stable.
What ion does Calcium form
what is Ca 2+
According to the law of conservation of mass, what happens in a chemical reaction?
What is Matter is not created or destroyed and the same amount of mass remains.
If you mix two liquids and a solid forms, what is the solid called?
What is a precipitate