Chem 1
Who was the first person to arrange the elements in the periodic table?
Dmitri Mendeleev
-4
How did the first man arrange the elements?
Atomic Mass
-7
What are the elements in the 17th group called?
Halogens
4
Moseley arranged the Periodic Table by__________
atomic number (protons)
3
What is an ion?
An atom that has gained or lost an electron
-2
Of the following elements, which as the largest atomic radius: sodium, magnesium, phosphorus, or chlorine? Why?
Sodium- Atomic radii get smaller as you go left to right when in the same period
1
What is a valence electron?
An electron in the outermost shell that can be gained or lost.
5
Which element will have a higher first ionization energy: C or F? Why?
Florine- IE increases across a period
10
The number of valence electrons for elements found in group 16 is ________.
6 ( group number minus 10)
8
What is a characteristic of the p-block?
Very diverse
Metalloids
Metals (harder than 1&2, but softer than 3-12)
-6
What is the atomic radius trend across a period?
Smaller left to right
-10
What are the elements in Group 18 called?
Nobles Gases
-3
What is ionization energy?
The energy required to remove an electron
-1
What is the radius trend down a group?
Larger from top to bottom
9
The electron configuration of an element in its ground state is [Ar]3d104s24p5. This element is in the _________ period.
4th period
2
What is electronegativity?
Atoms ability to attract an electron
-8
What are the group one elements called?
Alkali Metals
7
What is the group and period trend of ionization energy?
Period- increases left to right
Group- decreases left to right
6
List the group, period, and block (s, p, d, or f) in which the element with the electron configuration [Rn]7s1 is located.
Group- 1
Period 7
Block- s
-5
For each element listed below, determine the charge of the ion that is most likely to be formed. Also indicate whether it will be an anion or cation
Li, Mg, Cl, O
Li+ (cation), Mg2+ (Cation), CL- (anion), O2- (anion)
-9
Super, Duper, totally awesome, unbelievably fun question is................ What color is water??
As some suggest, water is not blue due to the reflection of the sky. Water is blue on its own. Any object shows a given color because it is absorbing visible light from some other wavelength preferentially. Water has a weak absorption band in the red part of the visible spectra (close to the infrared zone). For this reason, water shows a blue color. Since this red absorption band is so weak, we can only observe the blue color if we have a massive volume of water. That is why water in a glass appears to be colorless, but bigger volumes such as oceans, lakes, or swimming pools, are blue.