Questions 75-100 Flashcards
The anion formed from an oxygen atoms is called a(n)
Oxide ion
When a fixed sample of gas increases in volume, but the must also
Decrease in pressure
The law of conservation of mass cannot be
Created or destroyed
Which of the owing is a compound
Salt
A material that can be represented by a chemical formula is
A pure substance
What is the mass number of an element that has 19 protons, 19 electrons, and 20 neutrons
39
How do you know that potassium, an alkali metal, is highly reactive
It has one valence electron
Convert 1,250 milimoles to moles
1.25 mol
Which tool would
A scientist use to find information on the structure of an atom
Particle accelerator
The chemical element that is most abundant in the human body is
Oxygen
Atoms sometimes form bonds to
Become more stable
According to modern atomic theory, it is nearly impossible to determine an electron’s exact
Position
