mjlchance367
20.10.2019 •
Chemistry
How many valence electrons will an atom of iron atomic number 26 have? explain why this is.
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Ответ:
there are two electrons in 1s
two electrons in 2s
six electrons in 2p
two electrons in 3s
six electrons in 3p
eight electrons in 3d
valence electron is 3 so 3s3p3d = 2+6+8
=16 electrons in valence shell
Ответ:
B. glycerin (1.26 g/cm3).
Explanation: The substances with higher value of density than the density of corn syrup will sink and the substances with lower value of density than the density of corn syrup will float.
A. graphite : has a density of
which is higher than the density of corn syrup which is 
, Thus it will sink.
B. glycerin: has a density of
which is lower than the density of corn syrup which is 
, Thus it will float.
C. copper :has a density of
which is higher than the density of corn syrup which is 
, Thus it will sink.
D. silver: has a density of
which is higher than the density of corn syrup which is 
, Thus it will sink.