Groups/Family
How many groups are there in the periodic table?
What is 18?
What group is Halogens located at?
Group 17
Metals are located on what side of the stair case?
To the left
how do isotopes affect the atomic mass of an element?
The neutrons are changed, so it affects the mass of the element
The mass number is the sum of the _____ and _______ in the nucleus.
protons and neutrons
Can you name a few elements that belong to the same group of Alkali Earth Metals.
What is Be, Mg, Ca, Sr, Ba, Ra
The zig-zag line or staircase is known to house what specific group of elements?
metalloids
Where are the inner transition metals located?
The bottom pop-out
Write the isotope notation of Chlorine - 19
1917 Cl
The element Tin (Sn) is considered a?
Which elements would have the most similar properties?
1. elements in the same group
2. elements in the same period
1. Elements in the same group
Non- metals are known to have what characteristics? (Give 2)
1. Poor conductors of heat and electricity
2. Brittle
3. Can be found in various states of matter including solids, liquids, and gases.
What are 3 common characteristics of metals on the periodic table?
Good conductors of heat and electricity, having shiny appearance, and being malleable and ductile.
Can you explain the difference between an isotope and from a regular element?
isotopes have a different number of neutrons and mass number
What specific group is known to contain all 3 states of matter? Solids, Liquids, and Gas.
What is Halogens?
What do periods on the table tell you
What is the amount of energy levels (outer shells) the elements share.
Metalloids are its own group and share what kind of characteristics? (Give 2)
1. Semi-conductor
2. Share similar characteristics of both metals and non- metals
Name a characteristic of alkali metals other than having 1 valence electron.
1. Highly reactive
2. they are soft and can be easily cut with a knife
3. good conductors of heat and electricity
4. React vigorously with water
5. Soft-silvery white color
What is the steps of calculating the average atomic mass?
1. Atomic mass TIMES abundance %
2. Move the decimal two times to the left (because you're multiplying percentages)
3. Add the results together
Can you name the halogens in the periodic table? (what group #)
Group 17, 7A
Which group (tell me the name and number) contains the most reactive metals?
Why did Mendeleev leave gaps in the period table?
What is, for elements that had not yet been discovered.
- He predicted the properties of these missing elements based on the patterns he observed in the known elements.
Do metals tend to lose or gain electrons to form positive ions?
They tend to lose electrons! This is because metals have fewer valence electrons in their outermost energy level, and losing those electrons allow them to achieve a stable electron configuration.
Find the average atomic mass of two isotopes. Eu - 151 and Eu- 153
Eu -151 has a abundance of 48.03%
Eu -153 has a abundance of 51.97%
the average atomic mass is 152.04
What element is near the staircase and is not a metalloid but actually a metal?
What is Aluminum (Al)