Science & Mathematics - 1 November 2006

1- What's the maximum number of electrons that can occupy the third principal energy level?


2- Why do electrons fill the 4s orbital before they start to occupy the 3d orbital?

2006-11-01 11:19:28 · 2 answers · asked by Theo Z 2 in Chemistry

if so, would you still be arachnophibic?

2006-11-01 11:18:59 · 4 answers · asked by Anonymous in Medicine

A line contains (4,3) and (x,7). It has slope 2. Find x.

2006-11-01 11:18:23 · 9 answers · asked by xxd3bbst3Rsxx 2 in Mathematics

-3 x +2 = -7x - 22

2006-11-01 11:17:27 · 8 answers · asked by scott c 1 in Mathematics

Please Help Me.

2006-11-01 11:17:20 · 4 answers · asked by screameagle369 1 in Chemistry

2006-11-01 11:12:57 · 12 answers · asked by a flower 2 in Astronomy & Space

pictures please

2006-11-01 11:11:39 · 11 answers · asked by Anonymous in Zoology

The area of a square is 45 more than its perimeter. Find the length of a side.

Please say how you got your answer as well.

2006-11-01 11:09:21 · 5 answers · asked by Anonymous in Mathematics

Is there a source for the record of the snowfalls in Chicago specifically on the lakefront. I can find all sorts of records for Chicago, in general, but that is measured at O'Hare airport.

2006-11-01 11:07:44 · 2 answers · asked by DANIEL R T 2 in Weather

An object is dropped from a height of 50m, on a certain planet it took 5 seconds to reach the ground. What is the weight of the object on the planet if its weight on earth is 35N?

2006-11-01 11:06:26 · 5 answers · asked by Anonymous in Physics

2006-11-01 11:05:47 · 1 answers · asked by Anonymous in Earth Sciences & Geology

2006-11-01 11:04:27 · 5 answers · asked by george m 1 in Chemistry

does a substance get hotter when it melts

2006-11-01 11:03:24 · 6 answers · asked by Anonymous in Chemistry

How many orbitals are completely filled in an atom whose electron configuration is 1s22s22p63s1 ??

2006-11-01 11:03:17 · 3 answers · asked by Theo Z 2 in Chemistry

find it in under 1 minute. show me how to do it to get picked best.=)

2006-11-01 11:02:27 · 6 answers · asked by heyy sunny. < 3 2 in Mathematics

If you have a 5 gallon jug and a 3 gallon jug with unlimited water, how do you put 4 gallons into the 5 gallon jug?

2006-11-01 11:02:17 · 21 answers · asked by minipeck2699 1 in Mathematics

2006-11-01 11:00:43 · 4 answers · asked by sean_mchugh6 3 in Mathematics

2006-11-01 11:00:33 · 4 answers · asked by timfarland 1 in Weather

2006-11-01 11:00:19 · 10 answers · asked by Melissa R 1 in Zoology

Phenylketonuria is an inherited disease caused by a recessive allele. If a woman has this disease, and her husband is heterozygous for this disease, what is the probability that their first child will be a phenotypically normal one?
A) 1/4
B) 1/2
C) 1/16
D) 1

2006-11-01 10:59:26 · 6 answers · asked by Solari 1 in Biology

2006-11-01 10:59:18 · 13 answers · asked by Anonymous in Biology

2006-11-01 10:57:49 · 4 answers · asked by Elizabeth s 1 in Physics

i need this answer for my next test.

2006-11-01 10:57:07 · 4 answers · asked by cute girlz 2 in Physics

does a substance get colder when its freezing?

2006-11-01 10:56:59 · 8 answers · asked by Anonymous in Chemistry

2006-11-01 10:56:43 · 1 answers · asked by Sheena Q 1 in Biology

A projectile is launched with an initial speed of 18.5 m/s at an angle of 74 degrees above the horizontal.
What are the x and y components of the initial velocity?

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What are the x and y components of a vector in the xy plane if its direction is 290° counterclockwise from the positive x axis and its magnitude is 6.3 units?
Ax = units
Ay units

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2006-11-01 10:56:07 · 1 answers · asked by ckielblock18 1 in Physics

science

2006-11-01 10:55:31 · 3 answers · asked by jesselove91 1 in Biology

Questions:

1- Write the electron configuration for an atom that has 13 electrons.

2- Write the electron configuration for an atom that has 33 electrons.

2006-11-01 10:53:31 · 4 answers · asked by Theo Z 2 in Chemistry

Following a practical I have plotted concentration in mol dm-3 against time on a graph.

I need to calculate the rate of diffusion using the figures I have.

If I select two points on the graph

ie at 15 minutes the concentration value is 1.57 x 10 to power -6

and at 105 minutes the conc. is 5.5 x 10 to power -6


would I work out the rate of diffusion per minute in the following way?

(5.5 - 1.57) divided by (105 - 15)

I'm not great with using powers either so could someone please explain

thankyou!

If you need any other info please let me know

2006-11-01 10:51:58 · 1 answers · asked by jane 62 1 in Chemistry

2006-11-01 10:51:41 · 3 answers · asked by justcurious 1 in Zoology