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1. Chemistry

   Hi. Is PO4(3-) polar or non-polar? Why or why not? Thanks! Look up the electronegativity of P and O. I think I remember that O is about 3.5 and P is about 2.1; therefore, each P-O bond is somewhat polar. Thus, the ion will be

2. Chemistry

   1)How many protons and electrons are in a sulfate ion SO4^2- ? I know the answer is 48 protons and 50 electrons but i do not know how to get this from the ion. 2) What is the charge on a sulfide ion? The answer is -2 but im not

3. Chemistry

   In which orbital does an electron in a phosphorus atom experience the greatest effective nuclear charge? a. 1s b. 2s c. 2p d. 3s e. 3p I originally thought 3p, since those are the outer electrons, but that was marked wrong. Why is

4. Chemistry

   How many valence electrons does molybdenum have? (give only 1 answer) Go to this site and look for the electrons available in the outside shells. Click on element #42 and scroll down the menu on the left side until you come to

1. Ap Chem

   explain each of the following observations using principles of atomic stucture and/or bonding. a] potassium has a lower first-ionization engergy than lithium. b] the ionic radius of N3- is larger than that of O2-. c] a calcium

2. Chem - Elements

   I need help on identifying four elements. 1. a member of the same family as oxygen whose most stable ion contains 54 electrons. (Sulfur?) 2. member of alkali metal family whose most stable ion contains 36 electrons. (Cesium??) 3.

3. Configuration

   What is the electronic configuration of carbide C-4? Thought it was 1s2 2s2 sp2. Thanks from Sheryl C is atomic number 6. Electronic configuration of the neutral atom is 1s2, 2s2, 2p2. The carbide ion, C^-4, has four more

4. biology

   Sulfur has six electrons in its outer most energy level. In ionic bonding, it would tend to ­­­­­­­­­_____________________________. A. take on two more electrons B. give away two electrons C. give away six electrons D.

1. chemistry

   The charge and identity of an ion with 16 protons, 18 electrons and 17 neutrons would be?

2. Science

   The Composition of Atoms Quick Check questions and answers Science 8 A Unit 3: Matter Interactions A. A model of an atom shows eight electrons in rings that represent different energy levels. How many electrons are in each energy

3. Chemistry

   A nitride ion has 7 protons, 8 neutrons, and 10 electrons. What is the overall charge on this ion? A. -3 B. -2 C. 0 D. +3

4. math

   A calcium ion has 20 protons and 18 electrons. Each proton has a +1 charge and each electron has a -1 charge. What is the charge of the calcium ion?

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