Question 1: Oxygen has ____ valence electrons. To have a complete outer shell it will most likely (gain / lose) two electrons giving it a ( +2 / -2 ) charge.
Question 2: What is an isotope?
Question 3: How many valence electrons do the following elements have?
Li - ______ Ca - _____ B - _____ Se - _____
Question 4: If Lithium and oxygen were placed together - predict what most of it would form (circle one): Li O (Lithium monoxide) Li2 O (Lithium Oxide) or Li2O2 *(Lithium peroxide) Why?
Answer 1: Oxygen has 6 valence electrons. To have a complete outer shell, it will most likely gain two electrons giving it a -2 charge.
Answer 2: An isotope is a variant form of an element that has the same number of protons but a different number of neutrons in its nucleus.
Answer 3:
Li - 1 valence electron
Ca - 2 valence electrons
B - 3 valence electrons
Se - 6 valence electrons
Answer 4: If lithium and oxygen were placed together, they would most likely form Li2O (lithium oxide). This is because oxygen needs to gain two electrons to have a complete outer shell, and lithium can lose one electron. So, two lithium atoms would combine with one oxygen atom to form lithium oxide.
Answer 1: Oxygen has 6 valence electrons. To have a complete outer shell, it will most likely gain two electrons, giving it a -2 charge.
Answer 2: An isotope is a variant form of an element with the same number of protons but a different number of neutrons in the nucleus.
Answer 3: The number of valence electrons for each of the elements mentioned are as follows:
Li - 1 valence electron
Ca - 2 valence electrons
B - 3 valence electrons
Se - 6 valence electrons
Answer 4: If lithium and oxygen were placed together, they would most likely form Li2O (lithium oxide). This is because lithium typically loses one electron to achieve a stable electron configuration, while oxygen typically gains two electrons. By transferring an electron from lithium to oxygen, they can both achieve a stable configuration.
Question 1:
Oxygen has 6 valence electrons. To determine the number of valence electrons of an element, you can refer to the element's position on the periodic table. Oxygen is in Group 16 (also known as Group VIA), which means it has 6 valence electrons.
To have a complete outer shell, oxygen will most likely gain two electrons, giving it a -2 charge.
To get the answer to this question, you can look at the electron configuration of oxygen, which is 1s2 2s2 2p4. The outermost shell, or valence shell, is the second shell (2s^2 2p^4), and it has six electrons.
Since oxygen has six valence electrons and needs eight to have a complete outer shell, it can either gain two electrons to reach eight or lose six electrons to have two. However, oxygen is more likely to gain two electrons to form a stable negative ion with a -2 charge.
Question 2:
An isotope is an atom that has the same number of protons but differs in the number of neutrons. In other words, isotopes of an element have the same atomic number but different atomic masses.
To find the answer to this question, you can consult any reliable scientific source or refer to a chemistry textbook. Isotopes are commonly discussed in the context of nuclear chemistry and physics.
Question 3:
Li - 1 valence electron
Ca - 2 valence electrons
B - 3 valence electrons
Se - 6 valence electrons
To determine the number of valence electrons for each element, you can check their positions on the periodic table. The column they belong to represents the number of valence electrons they have. For example, Lithium (Li) is in Group 1, so it has 1 valence electron. Calcium (Ca) is in Group 2, so it has 2 valence electrons. Boron (B) is in Group 13, so it has 3 valence electrons. Selenium (Se) is in Group 16, so it has 6 valence electrons.
Question 4:
If lithium and oxygen were placed together, most of it would form Lithium Oxide (Li2O).
To predict the most likely combination between elements, we need to consider their valence electrons. Lithium has 1 valence electron, and oxygen has 6 valence electrons.
Lithium tends to lose its solitary valence electron to achieve a more stable electron configuration. When it loses this electron, it forms a Li+ cation.
On the other hand, oxygen tends to gain two electrons to complete its valence shell and achieve a stable configuration. When it gains these electrons, it forms an O2- anion.
Since lithium will donate one electron and oxygen needs two electrons to form a bond, it would require two lithium atoms and one oxygen atom to create a stable compound. Therefore, the most likely combination would be Li2O, known as Lithium Oxide.
Li O (Lithium monoxide) is not as likely because oxygen needs to gain two electrons, and combining with a single lithium atom is not enough to achieve this.
Li2O2 (Lithium peroxide) is also less likely since both lithium and oxygen tend to form stable compounds by achieving a full valence shell, and having peroxide bonds (O-O) is not the most common option for these elements.