Chemistry

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Measurements show that the pH of a particular lake is 4.0. What is the hydrogen Started by Hawke	2 Replies 1,065 Views	May 30, 2013 by Hawke
In the figure above, how many unpaired electrons does phosphorus have in its val Started by Hawke	3 Replies 1,092 Views	May 28, 2013 by coco
How many electrons does an atom of sulfur have in its valence shell (see the fig Started by Hawke	3 Replies 1,291 Views	May 28, 2013 by coco
Trace elements are those required by an organism in only minute quantities. Whic Started by Hawke	1 Replies 1,400 Views	May 28, 2013 by Melanie
Which of the following statements is false? A) Carbon, hydrogen, oxygen, and nit Started by Hawke	1 Replies 802 Views	May 28, 2013 by Melanie
What factors are most important in determining which elements are most common in Started by Hawke	1 Replies 815 Views	May 28, 2013 by Melanie
In what way are elements in the same column of the periodic table the same? A) T Started by Hawke	1 Replies 932 Views	May 28, 2013 by Melanie
One difference between carbon-12 ( ) is that carbon-14 ( ) has A) two more proto Started by Hawke	1 Replies 1,093 Views	May 28, 2013 by Melanie
An atom has 6 electrons in its outer shell. How many unpaired electrons does it Started by Hawke	1 Replies 2,070 Views	May 28, 2013 by Melanie
The atomic number of nitrogen is 7. Nitrogen-15 is heavier than nitrogen-14 beca Started by Hawke	1 Replies 2,129 Views	May 28, 2013 by Melanie
Electrons exist only at fixed levels of potential energy. However, if an atom ab Started by Hawke	1 Replies 2,477 Views	May 28, 2013 by Melanie
From its atomic number of 15, it is possible to predict that the phosphorus atom Started by Hawke	1 Replies 1,558 Views	May 28, 2013 by Melanie
Atoms whose outer electron shells contain 8 electrons tend to A) form ions in aq Started by Hawke	1 Replies 2,789 Views	May 28, 2013 by Melanie
The atomic number of each atom is given to the left of each of the elements belo Started by Hawke	1 Replies 1,100 Views	May 28, 2013 by Melanie
Two atoms appear to have the same mass number. These atoms A) must have the same Started by Hawke	1 Replies 4,194 Views	May 27, 2013 by coco
Fluorine has an atomic number of 9 and a mass number of 19. How many electrons a Started by Hawke	1 Replies 1,069 Views	May 27, 2013 by coco
Which of the following molecules contains the most polar covalent bond? A) H2 B) Started by Hawke	1 Replies 1,078 Views	May 27, 2013 by coco
Which drawing in the figure above depicts the electron configuration of an eleme Started by Hawke	1 Replies 1,097 Views	May 27, 2013 by coco
Which drawing in the figure above depicts the electron configuration of an atom Started by Hawke	1 Replies 1,049 Views	May 27, 2013 by coco
Which drawing in the figure above depicts the electron configuration of an atom Started by Hawke	1 Replies 1,038 Views	May 27, 2013 by coco
Which drawing in the figure above is of the electron configuration of a sodium 1 Started by Hawke	1 Replies 1,366 Views	May 27, 2013 by coco
Which drawing in the figure above depicts the most electronegative atom? A) A B) Started by Hawke	1 Replies 1,283 Views	May 27, 2013 by coco
A covalent bond is likely to be polar when A) one of the atoms sharing electrons Started by Hawke	1 Replies 1,041 Views	May 27, 2013 by coco
What is the maximum number of electrons in a single 2 p orbital of an atom? A) 1 Started by Hawke	1 Replies 3,230 Views	May 27, 2013 by coco
How many neutrons are present in the nucleus of a phosphorus-32 (32P) atom (see Started by Hawke	1 Replies 1,683 Views	May 26, 2013 by coco