1) A negatively charged ion is chloride
2) Moving from left to right, valence electrons increase by one.
3) The period number gives information about how many energy levels it has
4) Fluorine has a charge of 1–
5) Potassium and iodine form an ionic bond
The periodic table is an arrangement of elements into groups and periods based on their periodic properties.
In the periodic table, elements are arranged in groups and periods. There are 18 groups and 8 periods.
Chlorine is in group 17, there have seven outermost electrons hence the chlorine atom needs only one more electron in order to attain a stable octet. This is done by accepting one electron to form the negatively charged chloride ion.
As we move from one period to another, one extra electron is added to the outermost shell of elements. Hence, the valence electrons increases by one.
The period to which an element belongs shows you the number of shells or energy levels in the atom of that element.
Fluorine is in group 17. One electron is needed to achieve a stable octet. When an atom accepts one electron, its charge is 1–.
Bonding based on ionic charges occurs between metals and nonmetals. Potassium is a metal of group 1 and iodine is a non metal of group 17 hence they can bond together based on their ionic charges.
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Answer:
1) D
2) A
Explanation:
1) Each group has the same number of valence electrons, which are the outer electrons.
2) Ionic bonds are between a metal and non - metal, the metal being sodium and the non - metal being chlorine.
Answer:
number 3 The wind because the wind has strong pressure which causes to change peoples directions in where they are going
Explanation:
hope this helped by the way i think you answered b and 4 i don't know if this is a test and i sent this at the wrong time :(
Answer:
-2.70 rad/s²
Explanation:
Given that
ω1 = initial angular velocity of the flywheel, which is 6.77 rev/s
If we convert it to rad/s, we have
(6.77 x 2π) rad/s = 13.54π rad/s
ω2 = final angular velocity of the flywheel = -3.51 rev/s,
On converting to rad/s also, we have
(-3.51 x 2π) rad/s = 7.02π rad/s
α = average angular acceleration of the flywheel = ?
Δt = elapsed time = 23.9 s
Now, using the formula, α = (ω2 - ω1)/Δt. On substituting, we have
α = (-7.02π rad/s - 13.54π rad/s)/23.9 s
α = -20.56π rad/s / 23.9 s
α = -64.59 rad/s / 23.9 s
α = -2.70 rad/s²
Therefore, the average angular acceleration of the flywheel is -2.70 rad/s²
