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hydrogen is an unusual element because it behaves in some ways like the alkali metal elements and in other ways like
a which ion is smaller co3 or co4b in a lithium ion battery that is discharging to power a device for every li that
a if the core electrons were totally effective at screening the valence electrons and the valence electrons provided no
1 until the early 1960s the group 8a elements were called the inert gases before that they were called the rare gases
little is known about the properties of astatine at because of its rarity and high radioactivity nevertheless it is
an element x reacts with oxygen to form xo2 and with chlorine to form xcl4 xo2 is a white solid that melts at high
chlorine reacts with oxygen to form cl2o7table- prefixes used in naming binary compounds formed between nonmetals
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a what is the trend in first ionization energies as one proceeds down the group 7a elements explain how this trend
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in the ionic compounds lifnacl kbr and rbi the measured cation-anion distances are 201 aring li-f 282 aring na-cl 330
tungsten has the highest melting point of any metal in the periodic table 3422 degc the distance between w atoms in
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a moseleys experiments on x-rays emitted from atoms led to the concept of atomic numbers where exactly do these x-rays
the prefix ekacomes from the sanskrit word for one mendeleev used this prefix to indicate that the unknown element was
an element x reacts with f2g to form the molecular product shown herea write a balanced equation for this reaction do
in the chemical process called electron transfer an electron is transferred from one atom or molecule to another a
make a simple sketch of the shape of the main part of the periodic table as showna ignoring h and he write a single
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1 in the diagram to the right which of the labels correctly identifies a thunderstorm componenta anvil cloudb mammatus
for certain clients their reason to seek the help of a personal trainer is to help improve performance and fitness for
a 22 kg child slides down a 25-m -high playground slide she starts from rest and her speed at the bottom is 10 ms what
1 which of the following terms describes the bodys ability to maintain its normal statea anabolism b catabolism c
1 which of the following organs removes bilirubin from the blood manufactures plasma proteins and is involved with the