Atoms & Elements Powerpoint 2 Flashcards
Who is responsible for the discovery of the law of conservation of mass?
Lavoisier
The law of conservation mass makes two important statements being ?
In a chemical reaction, mass is neither created nor destroyed
therefore
total mass of reactants = total mass of products
Light is made of ?
photons
Rays are made of ?
glowing particles
Protons carry what charge?
+1
Electrons carry what charge?
-1
Neutrons carry what charge?
0, neutral
Does Li ^3+ gain or lose electrons?
It loses 3 electrons
Does Se ^2- gain or lose electrons?
It gains 2 electrons
Mass number = what and what?
Protons and Neutrons
Anions (ex. Fe 2-) are named by changing the ending of the element name to ?
-ide
Fluorine | F- = Fluor___?
Fluoride
Oxygen| O ^2- =Ox___?
Oxide
Which of the following statements are true about Group 1a in the periodic table?
a) group 1a are non metals
b) group 1a are alkaline earth metals
c) group 1a are alkaline metals
d) group 1a are halogens
Correct Answer:
c) Group 1a are alkaline metals ( EXCEPT HYDROGEN)
Select from the following statements all that are true about GROUP 2A in the periodic table?
a) group 2a are non metals
b) group 2a are alkaline earth metals
c) group 2a are alkaline metals
d) Mg & Ca caused this group to be classified this way
Correct Answer:
b) group 2a are alkaline earth metals
d) Mg & Ca caused this group to be classified this way
Name all the elements considered Metalloids
Boron
Silicone
Germanium
Arsenic
Antimony
Tellurium
Polonium
Astatine
Group 7a in the periodic table = ?
Halogens
Group 8a in the periodic table = ?
Noble Gases
Hg=
Pb=
Au=
Ag=
Sn=
Hg= Mercury
Pb= Lead
Au= Gold
Ag= Silver
Sn= Tin
Metals are _______ at room temp.
______ is the only liquid metal.
Typically _______________.
Conducts ____________.
Conducts ___________.
Malleable can be _________.
!!_______ electrons and form _______ in reactions!!
About 75% of the elements are ______.
Metals are SOLID at room temp.
MERCURY is the only liquid metal.
Typically SHINY/REFLECTIVE
Conducts HEAT.
Conducts ELECTRICITY.
Malleable can be SHAPED.
!!LOSES electrons and forms CATIONS in reaction.!!
About 75% of the elements are METALS.
Nonmetals can be ______, ________, or _____.
Non metals are ________ conductors of _________.
Non metals are ________ conductors of ___________.
Non metal solids are _______, & can be ________.
!! Non metals ______ electrons, that form _______ in reactions!!
__________ is also a non metal.
Nonmetals cane be SOLID, LIQUID, or GAS.
Nonmetals are POOR conductors of HEAT.
Nonmetals are POOR conductors of ELECTRICITY.
Nonmetal solids are BRITTLE, and can be POWDER.
!! Nonmetals GAIN electrons, that form ANIONS in reactions!!
HYDROGEN is also a nonmetal.
Metalloids are very similar to ___________.
Metalloids are_______.
Metalloids are ______, not _______.
Metalloid’s unique property is that they are GREAT __________, aka great at producing ___________.
Metalloids conduct HEAT better than _________, but not as well as __________.
Metalloids are very similar to NONMETALS.
Metalloids are SOLID.
Metalloids are DULL, NOT SHINY.
Metalloid’s unique property is that they are GREAT SEMICONDUCTORS, aka great at producing ELECTRICITY.
Metalloids conduct HEAT better than NON METALS, but not as well as METALS.
Weight of mole = what unit?
Weight of MOLE = GRAMS
Ex. 1 mol of Au = 196.97g
Weight of atom = what unit?
Weight of ATOM = AMU
Ex. 1 Zn atom weighs = 65.38 amu
