Which property do the elements in each column of the representative elements series of the periodic table have in common
number of protons
number of orbitals
number of neutrons
number of valence electrons
Which element has six valence electrons
oxygen (O)
phosphorus (P)
carbon (C)
lead (Pb)
Which statement correctly compares the number of protons and electrons in atoms of rubidium (Rb) and calcium (Ca)
Rubidium has fewer protons and more electrons than calcium.
Rubidium has more protons and fewer electrons than calcium.
Rubidium has fewer protons and fewer electrons than calcium.
Rubidium has more 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
58
39
20
19
Which element does not have the same number of electrons in its outermost shell as the other elements in its group
hydrogen (H)
bromine (Br)
boron (B)
helium (He)
Well, it's time for me to show off my chemistry jokes!
1. Which property do the elements in each column of the representative elements series of the periodic table have in common?
They all have a talent for making chemical reactions awkward at parties!
2. Which element has six valence electrons?
Phosphorus (P). It's valence electrons are just trying to make some "phosphorus" jokes!
3. Which statement correctly compares the number of protons and electrons in atoms of rubidium (Rb) and calcium (Ca)?
Rubidium has more protons and fewer electrons than calcium. It's like rubidium is saying, "I'm more positive about myself than calcium!"
4. Potassium’s atomic number is 19, and its atomic mass is approximately 39. How many neutrons does potassium have?
Let me grab my detective hat and solve this one. *puts on a detective hat* Ah, the answer is 20! Neutrons can be quite slippery, but I still caught 'em!
5. Which element does not have the same number of electrons in its outermost shell as the other elements in its group?
Helium (He)! It's just trying to be different, always standing out in the noble gas group.
To answer these questions, let's break it down step by step:
1. The elements in each column of the representative elements series of the periodic table have a common property: the number of valence electrons. Valence electrons are the electrons in the outermost shell of an atom responsible for the chemical behavior of an element. So, the correct answer would be the "number of valence electrons."
2. To determine the element with six valence electrons, we need to look at the periodic table. In this case, oxygen (O) has six valence electrons. Therefore, the correct answer is oxygen (O).
3. To compare the number of protons and electrons in rubidium (Rb) and calcium (Ca), we can use the periodic table. Rubidium has an atomic number of 37, which means it has 37 protons and 37 electrons. Calcium, on the other hand, has an atomic number of 20, meaning it has 20 protons and 20 electrons. Therefore, the statement "Rubidium has more protons and more electrons than calcium" is correct.
4. To find the number of neutrons in potassium (K), we subtract the atomic number from the atomic mass. In this case, the atomic number of potassium is 19, and the atomic mass is approximately 39. Therefore, potassium has 20 neutrons. Thus, the correct answer is 20.
5. To find the element that does not have the same number of electrons in its outermost shell as the other elements in its group, we need to identify the group and compare the outermost shell electron configurations. Among the given options, helium (He) stands out as it only has 2 electrons in its outermost shell (group 18), while the rest (hydrogen, bromine, and boron) have different electron configurations in higher numbered groups. Hence, the correct answer is helium (He).
By following these explanations, you can arrive at the correct answers.
The elements in each column of the representative elements series of the periodic table have the same number of valence electrons in common.
The element that has six valence electrons is sulfur (S).
The statement that correctly compares the number of protons and electrons in atoms of rubidium (Rb) and calcium (Ca) is: Rubidium has more protons and fewer electrons than calcium.
Potassium's atomic number is 19, and its atomic mass is approximately 39. Therefore, it has 20 neutrons.
The element that does not have the same number of electrons in its outermost shell as the other elements in its group is helium (He).