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chem.Stack #201959
Question | Answer |
---|---|
what's the amu for a proton? | 1.0073 |
whats the amu for a neutron? | 1.0087 |
what's the amu for an electron? | .00055 |
where can a proton be found in an atom? | nucleus |
where can a neutron be found in an atom? | nucleus |
where is an electron found in an atom? | outside the nucleus |
1836 electrons = ____protons | 1 |
lighting storm would be an example of ____ and _____ clashing | protons and electrons |
metals are a ___ charge | postitive |
nonmetals are a _____ charge | negative |
cations are ____ charged like metals | positve |
anions are ____ charged like non metals | negative |
metals conduct _____ and ______ | electricity and heat |
what has a shinny appearance, luster. ductile ( can take large pieces and make smaller) | metal |
metals or non-metals are good insulators? | non metals |
which metal is a liquid at room-temp? | Hg |
which non-metal is liquid at room-temp? | Br |
which element wants to be a non-metal and a metal? | Hydrogen |
Group 1A are _______ metals, are base elements with high pH | alkali |
group 2A are________ metals, are base elements with high pH | alkaline |
Group A is called the _______ group elements | Main group |
group 1A has ___ electrons, 2A?, 3A?, 4A?, 5A?, 6A?,7A? | 1,2,3,4,5,6,7 |
group 7A is the____ group. Also called the _____ formers. | Halogen group, salt formers |
Group 8A is called the _____ group. | gas |
what's the oct 8 rule? | there can not be no more atoms that 8 on the outside of the atom. |
hat do all the elemets want to be like? | nobel gases |
what are the 7 diatomic elements? | N, O, F, Cl, Br and H they make a 7 on the chart |
out of N, O, F, Cl, Br, H which does not belong and why? | Br bc its a liqiud |
what's an example of a diatomic element? | H(2) |
what's an example of a monatomic element? | Cl |
what are the Calcogens? what elements do they contain? | Group 6A the oxygen family. oxygen and sulfer, bc copper is made mostly of these two elements |
what are the inner transistion elements? | Lanthanides and Actinides |
what metal is liquid? | Mercury |
chemical reaction occurs bc of the _____ in the atom | electrons |
when an atom losses an electron it becomes ______ charged | positively |
when a n atom gains an electron gains an electron is becomes _____ charged | negatively |
first ionization energy (IE) or the ionization Potential (IP) is the ? | minimum amount of energy that it takes to gain or lose an electron |
_______ ________ of an element is the amount of energy absorbed when the electron i s added to form an anion with a negative charge | Electron affinity |
____ is the friendliest of all the metals | Iron |
______ desolves other metals to form alloys | Mercury |
what do dentist use to fill cavities? | Hg and Ag |
qiuck silver= _____, has the lowest melting point, and dissolves gold | Hg |
______ is the softest metal | Cesium |
______ is the best conductor of heat | silver |
_______ is most Malleable and ductile | Au |
what's the lightest metal? | lithium |
nobel and cinage metals are? | Ag, Au, C |
synthetic elements are or are not found in nature? | are not |
atomic number = the number of ------ and ------ | protons and electrons |
in the Quantum Theory ----- is most massive and ----- is least massive. what moves is a form of a wave? | neutrons, electrons, electrons |
what's avagadro's number? | 6.022x10(-) 23 |
how do you find % contribution of an element? | find the molar mass of the elements, take each element, divide it by the molar mass,& multiply it by 100 |
how would yo find .05 mols of H2SO4 (molar mass= 98.1g) | divide molar mass by .05 mols |