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Conventional wisdom had it that they weren't sure that they had the innermost shell of electrons, and decided to start half-way through the alphabet to allow for some inner shells. Subsequently proven unnecessary.
Wiki User
∙ 13y ago
Wiki User
∙ 15y agoThis is because all of these elements have seven electrons in the electron dot diagram thus needing eight to complete their second ring of electrons.
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Which metals are bad thermal or elecrical conductors?
All metals are generally good thermal conductors and electrical conductors because they have high densities. You will not find a metal that is a poor conductor like wood or glass, which are very poor electrical and thermal conductors. The best way to use metals and achieve poor thermal conductivity is by using two layers of metal and creating a vacuum between the two layers. Polyurethane is one of the best durable materials that offers good insulation (meaning that it's a poor thermal conductor), it's rated at 0.02 k W/m K. Polystyrene (styrofoam) is rated at 0.033 k W/m K. Fiberglass is 0.035 k W/m K. Corkboard is 0.04 k W/m K. Plywood is 0.11 k W/m K. Red Bricks are 0.6 k W/m K. Ordinary Glass is 0.8 k W/m K. Marble is 1.75 k W/m K. Granite is 2.2 k W/m K. OK, that gives you something to compare with. The closest thing to metal that is a good insulator (poor conductor) is Carbon Graphite, which comes in at 5.7 k W/m K. Surprisingly Stainless Steel is the next closest "poor" conductor and that comes in at 14 k W/m K., and Stainless Steel is not a poor conductor. Thermal heat conductivity occurs in three different ways: conduction (direct contact), convection (air contact) and radiant transfer (radiated through waves, e.g. sunlight waves) All metals can be considered as good electrical conductors, but Stainless Steel would also be the lower conductor of electricity.
How many milliliters are there in 0.019 liters?
Remember K H D | d c m (kilo, hecto, deka, (liter, meter, gram), deci, centi, milli). Milliliters are three places to the right of liters. So you have to move the decimal place three times to the right. You will get .019 L = 19 mL.
How many meters in a gallon?
A gallon is a measure of volume (similar to cubic meter or m^3), so the question of comparing m^3 with m, like comparing apples with oranges, is illogical. But if you meant comparing m^3 with a gallon, I think that is OK. 1 gallon = 3.78 L. 1 L = 0.001 m^3. Therefore, 1 gallon = 0.00378 m^3.
How many liters does 500 mililiters equal?
Remember K H D | d c m. Litres is three places to the left of millilitres. So you have to move the decimal place three times to the left. So in this case the answer is .5 litres.
How many milliliters are in 6.8 liters?
Remember K H D | d c m (kilo, hecto, deka, (liter, meter, gram), deci, centi, milli). Milliliters are three places to the right of liters. So you have to move the decimal place three times to the right. You will get 6.8 L = 6800 mL.
Why the atomic orbitals start with letter k and not start with a?
Niels Bohr said: " That's how we doin' ! " and it never has changed, so it's still called K,L,M...
How do you pronounce Mikael?
M I K A E L M I K A E L M I K A E L
How do you abbreviate Martin Luther King Jr?
M. L. King or M. L. King Jr or M. L. K. (M. L. K. Jr)
What is the value of k x l x m x n?
k, l, m, and n are integers and k x l = 6, l x m = 20 m x n = 15 and k x n =9
What has the author M L K Pringle written?
M. L. K. Pringle has written: 'Deprivation and education'
Who first suggested that the electrons orbited the nucleus in fixed energy levels?
Niels Bohr proposed the existence of seven distinct energy levels or electron orbits. He received the Nobel Prize in Physics in 1922.
Put letters j o m k l n l j m k l on collinear line?
Draw and label a line with collinear points J, K, L, M, N, and O. J and O are not between any points
3 equals L K that L T M?
This phrase translates to: 3 equals three letters K that represents L T M. It seems to be describing a code or puzzle where the letters K, L, and M represent certain values or concepts.
6 letter word using A L M E M HEY?
A L M E M H K T
Where was M L K born?
In Portland,Oregon
Who did Bohr marry?
Bohr married to m. in married
What letter is missing m k d s m s - s l m?
I
