Chemistry Quiz 1 Flashcards
What does WHMIS stand for?
Workplace Hazardous Materials Information System
What does SDS stand for?
Safety Data Sheet
Popsicle sign?
Gases under pressure
Flame
Flammable / Fire Hazard
Flame with a circle
Oxidizing Hazards
Skull
Cause death or toxicity
Person with heart attack
Health Hazardous
Beyblade
Biohazardous
spilling acid
Corrosion
explosion
explosion or reactivity
dying fish
May cause damage to the aquatic environment
exclamation mark
May cause less serious health effects or damage to ozone layer
Atomic number equals the number of _______ or _________
Protons or Electrons
Atomic mass equals the number of _______ + ________
Protons + Neutrons
Matter
Anything with mass and volume takes up space
Solid, Liquid, Gas
Mixture
matter that can be separated by physical means.
does not have a definite composition
(Heterogeneous or Homogeneous)
Heterogeneous Mixture
- Different components of mixture are visible
ex. salad dressing, orange juice, chilli
Homogeneous Mixture
- Different components are not visible
ex. Iced tea, Tap water, Sugar water
Pure substance
Matter that has a definite composition
(element or compound)
Element
- Cannot chemically be broken down
ex. Oxygen, Sodium, Gold
Compound
- Two or more elements that are chemically combined
ex. water, salt
Who made The Billiard Ball Model?
John Dalton
Who made The Raisin Bun Model?
J.J. Thomson
Who made The Solar System Model?
Ernest Rutherford
Who made the Energy Level Model?
Neils Bohr
Isotope
Different forms of the SAME element, only the number of neutrons changes.
What is the relationship between the period number and the number of energy levels?
Period number = Number of energy level
What is the relationship between the group number and the number of valence electrons?
Group number = Number of valence electrons
What is the relationship between the maximum number of electrons in each energy level and the number of atoms in each period of the periodic table?
The maximum number of atoms = the maximum number of elements in a period.
What is the relationship between the electron structure of group 1 ions and the electron structure of the nearest noble gas?
The electron structure of group 1 ions and the electron structure of the nearest noble gas have the same number of protons when you subtract 1 atom from group 1.
What is the evidence that noble-gases electron structure is stable?
The noble-gases electron structure is stable because they rarely share/gain or lose electrons.
