Physical Science

Question 1

How many covalent bonds does methane have?

Answer 1

CH4

Tetrahedron shape with 4 covalent bonds

Question 2

Formulas for resistance and etc.

Answer 2

R= V/I
resistance (ohms) = voltage(volts)/ current(amps)

RI=V

Question 3

Def: specific gravity

Answer 3

Ratio between the ratio of a substance and the density of water (1.00)

No unit, just a ratio

Question 4

Glucose chemical formula

Sucrose chemical formula

Answer 4

Glucose: C6H12O6

Sucrose: C12H22O11

Question 5

What is Charles’s law?

What is Boyle’s law?

Answer 5

Charles Law: When the pressure is kept constant, the temperature (K) and the volume will be in direct proportion
V/T = V/T

Boyle’s Law: The pressure exerted by an ideal gas is inversely proportional to the volume it occupies if the temperature is kept constant
PV = PV

Question 6

actinide

Answer 6

Elements 89-102 are called actinides. Electrons added during the Aufbau construction of actinide atoms go into the 5f subshell. Actinides are unstable and undergo radioactive decay. The most common actinides on Earth are uranium and thorium.

Question 7

alkali metal

Answer 7

The Group 1 elements, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr) react with cold water for form strongly alkaline hydroxide solutions, and are referred to as “alkali metals”. Hydrogen is not considered an alkali metal, despite its position on some periodic tables.

Question 8

alkaline earth

Answer 8

An oxide of an alkaline earth metal, which produces an alkaline solution in reaction with water.

Question 9

alkaline earth metal

Answer 9

The Group 2 elements, beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra) form alkaline oxides and hydroxides and are called “alkaline earth metals”.