The Atom
True or false: Science is reliable because it is based on evidence, but it can change if new evidence is found.
True
What is the lowest point of a wave called?
Is fruit salad a homogenous mixture or a heterogeneous mixture?
Heterogeneous mixture
Name one way the periodic table is organized
Teacher discretion
Groups, periods, order of increasing atomic mass, increasing atomic number, metals and nonmetals, etc
True or false: Everything we know in science is permanent and will never change.
False
Fluorine
What term refers to the material or substance hat waves travel through?
Medium
Is milk a pure substance or a mixture?
Mixture
How many valence electrons does Gallium (Ga, atomic number 31) have?
3
DAILY DOUBLE: Will the elements nitrogen and oxygen form an ionic bond or a covalent bond?
Are their valence electrons being transferred or shared?
Covalent - two nonmetals
Shared - because covalent
Which subatomic particle determines the identity of the element?
Protons
As frequency decreases, what happens to energy?
What is an example of a pure substance - compound?
Teacher discretion: Water (H2O), salt (NaCl)
Is Zirconium (Zr, atomic number 40) a metal or nonmetal?
Metal
Is odor a physical or chemical property?
Physical
An atom has 6 protons, 7 neutrons, and 2 electrons, what is its charge?
+4
All waves transfer __________.
Energy
What are the two categories that ALL matter can be sorted into?
Pure substances and mixtures
What is the reason why noble gases are not reactive?
Because they have a full octet/they are satisfied
What type of chemical reaction is shown below?
___ KBr + ___ Ag -> ___ AgBr2 + ___K
single replacement
How many protons, neutrons, electrons are in Aluminum (Al, atomic number 13)
P=13
N=14
e=13
True or false: Sound waves require a medium to travel.
True
What is an example of a homogenous mixture?
Teacher discretion
Milk, lemonade, broth, pudding, etc
What are three qualities of nonmetals?
Brittle, poor conductors, not lustrous
Balance the following reaction:
___ KBr + ___ Ag -> ___ AgBr2 + ___K
_2__ KBr + __1_ Ag -> __1_ AgBr2 + __2_K