is it a molecule (b)compound (c)element (d)isotope
217043
Element:\n\nA substance composed of atoms having an identical number of protons in each nucleus. Elements cannot be reduced to simpler substances by normal chemical means.
285419
a)mixture..they are together but they are not bonded\nb)mixture\nc)compound\nd) compound...the molecules are chemically bonded
518669
1)electron ...(also negative meson)\n2)the atom is the basic (many atoms make molecule and so on)\n3)polymer (the most famous are protiens)
478144
A) Valence Electrons\n\nI believe b, c and d show the results of the grouping not the reason they're grouped that way to start out with...\n \nb... No... The atom size increases instead of decreases\nc... No...\nc... No...  \nversa...
421066
'A Person' gives a short, simple, and correct answer. \n\nIt is simply when two atoms (ions [thus the name]) join to form a compound. One ion is + the other -.\n\nGet an "A".
121334
1. electron\n2. ionic\n3. molecules of compounds\n4. decomposition (not sure)
349316
a=oxygen diflouride\nb=dichlorine octoxide\nc= sulfur trioxide\nd=phosphorus pentoxide
530174
fission reaction or fusion? chain reaction? what molecules? neutrons may be? Uranuim isotope? nuclear fuel?\ni can't help you.
550947
b,\n\nall the others are ionic compounds.
615696
In scientific terms atoms are the smallest possible particle of a chemical element that retains its chemical properties. All atoms are made of the same basic elements, protons, neutrons and electrons , but each of the individual elements are made from different organizations of these materials. The basic structure of an atom is the nucleus, which is made of protons and neutrons (except hydrogen which only has a proton), and the electrons which, to over simplify it, "orbit" the nucleus. Elements are defined however by the number of protons in the nucleus, carbon always has 6 protons in it's nucleus, oxygen always has 8.\n\nAtoms are found EVERYWHERE. Everything you are, the air you breath, the things you smell, are all made of atoms, as others have said, it is the basic building block of everything, literally nothing would exist without them.\n\nIsotopes, contrary to what was said above, are in fact atoms, just a special kind of atom. The have the same amount of protons in their nucleus, hence they stay the same kind of element, but the have a different number of neutrons. I said above that hydrogen doesn't have a neutron in it's nucleus, and a standard hydrogen atom doesn't, but an isotope of hydrogen does, it's called deuterium, and it has 1 proton and 1 neutron in it's nucleus.\n\nDon't feel bad if you don't get it still, it really takes a class in chemistry to really get a handle on what exactly it all means. Good luck.
387599
Atoms are electrically neutral if they have an equal number of protons and electrons. Atoms which have either a deficit or a surplus of electrons are called ions. Electrons that are furthest from the nucleus may be transferred to other nearby atoms or shared between atoms. By this mechanism atoms are able to bond into molecules and other types of chemical compounds like ionic and covalent network crystals.\n[edit] Elements, isotopes and ions\nAtoms with the same atomic number Z share a wide variety of physical properties and exhibit almost identical chemical properties (for the closest instance to an exception to this principle, see deuterium and heavy water). Atoms are classified into chemical elements by their atomic number Z, which corresponds to the number of protons in the atom. For example, all atoms containing six protons (Z = 6) are classified as carbon. The elements may be sorted according to the periodic table in order of increasing atomic number. When this is done, certain repeating cycles of regularities in chemical and physical properties are evident.\n\nThe mass number A, or nucleon number of an element is the total number of protons and neutrons in an atom of that element, so-called because each proton and neutron has a mass of about 1 amu. A particular collection of a certain number of protons Z, and neutrons A-Z, is called a nuclide.\n\nEach element can have numerous different nuclides with the same Z (number of protons and electrons) but varying numbers of neutrons. Such a family of nuclides are called the isotopes of the element (isotope = "same place", because these nuclides share the same chemical symbol and place on the periodic table). When writing the name of a particular nuclide, the element name (which specifies the Z) is preceded by the mass number if written as a superscript, or else followed by the mass number if not a superscript. For example, the nuclide carbon-14, which may also be written 14C, is one of the isotopes of carbon, and it contains 6 protons and 8 neutrons in each atom, for a total mass number of 14. For a complete table of known nuclides, including radioactive and stable nuclides, see isotope table (divided).
365313
C3H8 is CH3-CH2-CH3\n\nthere is no way that this will fragment into CH4.\n\nyou will get fragments of\nCH3 (m/e = 15)\nCH2CH3 (m/e = 29)\n\ncan you see any way to split the above molecule into CH4?\n\nremember that fragmenting means destroying a bond, thus if you were to get CH4, you'd have to have started with CH4 bonded to something, but that breaks the octet rule...
382850
no too sure since its been a while since iv done this, but its a simple enough molecule, C2Br4  2Br to each carbon and a double bond between the carbons, its a linear moleule, not sure about the electronegativity of the elements as my notes r all packed away but the Br atoms should sit slightly of veritcal from each other toward the outside of the molecule. and im sure that the two halves sit at 90 degrees to each other, not sure if u call it this but if u do then 2 Br attached to one carbon will sit along the x- axis of the molecule and the two Br attached to the other carbon will sit along the Z-axis, ask ur tutor or teacher if this is correct as im not 100% sure\n\ntetrahedral only applies to CBr4, thats because the 4 Br are comin off the same carbon, because there are 2 carbons it changes it all together\n   (ignore the full stops, needed them to position the atoms decently)\n\nBr&#92; ........ /Br\n.......C=C\nBr/ ........ &#92;Br\n\nThis is not perfect but imagine the top Br on the left aiming toward you at 45 degrees and the top one on the right aiming away at 45 degrees, hope this helps
421776
i think an ion makes up a molecule. i am taking physical science and i went over it a few weeks ago.
398956
The answer is A), dimethyl amine.  B&C are primary amines while D is a tertiary amine.  A primary amine has two hydrogens attached to the nitrogen, a secondary amine has one hydrogen while a tertiary amine has none.  Note, however, that the nitrogen still always has three of something attached if it is an amine.  The organic part is often designated as "R" and/or "R' ".  So, dimethyl amine can be thought of as R2NH, where R=CH3.  This is kind of trivial in this case so it is more often used where R is a longer chain carbon compound.\n\nYou'd probably find the "R" designation used more for industrial chemicals rather than in an organic chemisty class.
206982
Isomers are molecules with the same chemical formula but different structures.  Isotopes are atoms of the same element but have different numbers of neutrons.  The right one for carbon is isomer
547878
a) +1\nb) 0   (in molecule state)\nc) 0\nd) -3\ne) 0\nf) +4 of Carbon\ng) +2 of Mg\nh) +1 of Chlorine (interesting!)\ni) +6 of Sulphur