Isotopes
Periodic Table
Lewis Structure
Periodic Trends
Electron Configuration
100
What is similar and different in the isotopes of the same element?
similar in number of protons different in the number of neutrons
100
Which family in the periodic table forms +2 ions?
Alkaline-earth metals
100
Draw the lewis dot structure for the element iodine?
symbol of iodine (I) with 7 dots around it.
100
What causes the atomic radius of elements to decreases from left to right across a period in the periodic table?
Effective Nuclear charge
100
what is the electron configuration for carbon?
1s^2 2s^2 2p^2
200
If you had a chart that showed the different isotopes of an element, their atomic masses, and their percent abundances, explain how you calculate the average atomic mass.
Convert the percents into decimals. Multiply each decimal by the appropriate atomic mass. Add these numbers together
200
which group or family of elements easily react with group 7A or the halogens?
group 1A or alkali metals
200
What do you call the unshared pair of electrons without bonding?
LONE pair of electrons
200
Which has a greater electronegativity between oxygen and fluorine?
fluorine
200
1s^2 2s^2 2p^5 is the electron configuration for what element?
fluorine
300
Identify the element from the following isotopes: 1st (95.907596 amu with 5.52%); 2nd(97.905287 amu with 1.88 %); 3rd (98.905937 amu with 12.70% ); 4th (99.904218 amu with 12.60%); 5th (100.905581 amu with 17.00%); 6th (101.90434 amu with 31.60%); 7th (103.905422 amu with 18.70%)
Ruthenium (Ru)
300
Which element in period 5 has similar properties with the element nitrogen?
Antimony (Sb)
300
draw the lewis structure for methane (CH4)
H l H --- c --- H i H
300
Which particle has a larger radius, neutral sodium atom (Na) or sodium ion (Na+) ?
neutral sodium ion
300
Which principle states that each electron occupies the lowest energy orbital available?
AUFBAU principle
400
Are Ni-59 and Co-59 isotopes?
No. they have different number of protons
400
Which group or family of elements in the periodic table has complete octet configuration?
group 8A or Noble gases
400
Using the lewis dot structure, what is the formula for a compound formed between Mg and N?
Mg3N2
400
Explain why magnesium has a smaller atomic radius than radium?
magnesium has fewer electrons or magnesium has fewer energy levels.
400
how many valence electrons does xenon have?
8
500
You find an element that has mass number 88 and 50 neutrons. You find another element with mass number 90 and 38 electrons. Are they isotopes? Show the work that led to your answer. (Both your reasoning and your final answer must be correct in order to receive any points)
Yes, they are isotopes 1st one: 88 (mass #) = 50 (neutrons) = 38 protons 2nd one: if there are 38 electrons, therefore there are 38 protons
500
Which element has 4 energy levels and has 6 electrons in the outermost energy level?
selenium (Se)
500
How is Ionic bond formed between a metal and a nonmetal?
metal gives of transfers its valence electrons while nonmetal gains the valence electrons from the metals.
500
describe the trends of ionization energy down a group and across a period on the periodic table.
ionization energy decreases down a group and increases across a period
500
write the shorthand or noble gas notation for silver (Ag)
symbol Kr inside the brackets followed by 5s2 4d9
M
e
n
u