Chemistry

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Trace elements are those required by an organism in only minute quantities. Whic Started by Hawke	1 Replies 1,201 Views	May 28, 2013 by Melanie
Which of the following statements is false? A) Carbon, hydrogen, oxygen, and nit Started by Hawke	1 Replies 641 Views	May 28, 2013 by Melanie
What factors are most important in determining which elements are most common in Started by Hawke	1 Replies 605 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 712 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 894 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 1,609 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 1,614 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 2,278 Views	May 28, 2013 by Melanie
The atomic number of neon is 10. Therefore, which of the following is most corre Started by Hawke	1 Replies 1,277 Views	May 25, 2013 by coco
From its atomic number of 15, it is possible to predict that the phosphorus atom Started by Hawke	1 Replies 1,385 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 2,484 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 810 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 4,030 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 883 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 2,892 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 774 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 844 Views	May 27, 2013 by coco
In comparing covalent bonds and ionic bonds, which of the following would you ex Started by Hawke	1 Replies 819 Views	May 26, 2013 by coco
What is the difference between covalent bonds and ionic bonds? A) Covalent bonds Started by Hawke	1 Replies 711 Views	May 26, 2013 by coco
In ammonium chloride salt (NH4Cl) the anion is a single chloride ion, Cl. What i Started by Hawke	1 Replies 1,183 Views	May 26, 2013 by coco
The atomic number of chlorine is 17. The atomic number of magnesium is 12. What Started by Hawke	1 Replies 972 Views	May 26, 2013 by coco
How many electron pairs are shared between carbon atoms in a molecule that has t Started by Hawke	1 Replies 694 Views	May 26, 2013 by coco
Which bond or interaction would be difficult to disrupt when compounds are put i Started by Hawke	1 Replies 829 Views	May 26, 2013 by coco
Which of the following is not considered to be a weak molecular interaction? A) Started by Hawke	1 Replies 733 Views	May 26, 2013 by coco
Which of the following would be regarded as compounds? A) H2O, O2, and CH4 B) H2 Started by Hawke	1 Replies 745 Views	May 26, 2013 by coco