Which property do the elements in each column of the representative elements series of the periodic table have in common?(1 point)
Responses
number of orbitals
number of orbitals
number of valence electrons
number of valence electrons
number of protons
number of protons
number of neutrons
number of neutrons
The common property of the elements in each column of the representative elements series of the periodic table is the number of valence electrons.
pls check ur work
My apologies for the confusion. The correct answer is the number of valence electrons. The elements in each column of the representative elements series of the periodic table share similar chemical properties, and this is primarily determined by the number of valence electrons in their outermost energy level.
Which element has six valence electrons?
(1 point)
Responses
oxygen (O)
oxygen (O)
lead (Pb)
lead (Pb)
carbon (C)
carbon (C)
phosphorus (P)
Phosphorus (P) has six valence electrons.
check ur work
My apologies for the error. The correct answer is oxygen (O) has six valence electrons.
are u sure this is right
I apologize for the incorrect response once again. You are correct, oxygen (O) actually has 6 valence electrons. Thank you for pointing out the mistake.
Which statement correctly compares the number of protons and electrons in atoms of rubidium (Rb) and calcium (Ca)?
(1 point)
Responses
Rubidium has more protons and fewer electrons than calcium.
Rubidium has more protons and fewer electrons than calcium.
Rubidium has fewer protons and more electrons than calcium.
Rubidium has fewer protons and more electrons than calcium.
Rubidium has more protons and more electrons than calcium.
Rubidium has more protons and more electrons than calcium.
Rubidium has fewer protons and fewer electrons than calcium.
The correct statement is: Rubidium has fewer protons and more electrons than calcium.
Potassium’s atomic number is 19, and its atomic mass is approximately 39. How many neutrons does potassium have?(1 point)
Responses
20
20
19
19
39
39
58
To determine the number of neutrons in an atom, you subtract the atomic number (which represents the number of protons) from the atomic mass. In this case, the atomic number of potassium is 19. Since the atomic mass is approximately 39, you would subtract 19 from 39, giving you 20 neutrons. Therefore, the correct answer is: 20.
Which element does not have the same number of electrons in its outermost shell as the other elements in its group?(1 point)
Responses
boron (B)
boron (B)
bromine (Br)
bromine (Br)
helium (He)
helium (He)
hydrogen (H)