Answer:
1st group (or 1A in some tables)
Explanation:
Mass number = number protons + number neutrons
23 = number protons + 12
number protons = 23 - 12= 11, so atomic number is 11.
Sodium (Na) has an atomic number 11.
Sodium is in the 1 group, or 1A group in some Periodic tables.
Answer:
YUHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Explanation:
FRRL ITS 3
Answer:
Smell of a perfume reaches us by the process of fusion
Explanation:
I hope it helps
Answer:
So CO2 = 4 + 6(2) = 16. So, total valence electrons are 16. Carbon is the least electronegative that means it stays at the center. So, put the Carbon in the middle and then set the oxygen either side of that!
Explanation:
Answer: In the exercise there are lost data, but I already found the exercise in a book
qsoot= 6.66e-18
no. electrons = approximately 42 electrons
Explanation:
msoot = 1.2e-12 kg
qcollector = 2e-06 C
rcollector = 0.1 m
The electric force must be equal to the weigth, so:
W=msoot*g (1)
Felec = k*qsoot*qcollector/r^2 (2)
equaling (1) and (2):
msoot*g = k*qsoot*qcollector/r^2 (3)
reorganizing the equation (3) and clear qsoot:
qsoot = (msoot*g*r^2)/(k*qcollector)
qsoot= 6.66e-18
no. electrons = qsoot / qelectron
no electrons = 41.6 electros (approximately 42 electrons)