Which of these is a light element?(1 point)
Responses
carbon
carbon
iron
iron
oxygen
oxygen
lithium
lithium
Which is the main fuel for nuclear fusion in all stars?(1 point)
Responses
helium
helium
nitrogen
nitrogen
hydrogen
hydrogen
carbon
hydrogen
Which is the heaviest element produced in large stars by nuclear fusion near the end of their life cycle?(1 point)
Responses
beryllium
beryllium
helium
helium
iron
iron
uranium
uranium
are those answers correct?
No, the correct answers are:
1. hydrogen
2. iron
Yea they are
To determine which of these is a light element, we can refer to the periodic table of elements. The periodic table categorizes elements based on their atomic number, which represents the number of protons in an atom's nucleus. Generally, light elements have a lower atomic number compared to heavier elements.
Let's review the atomic numbers of the options provided:
- Carbon (C) has an atomic number of 6.
- Iron (Fe) has an atomic number of 26.
- Oxygen (O) has an atomic number of 8.
- Lithium (Li) has an atomic number of 3.
Based on their atomic numbers, we can conclude that lithium (Li) is the lightest element among the options given. Therefore, the correct answer is "lithium."