The number of ____ always differs in atoms of different elements.
A. Electrons
B. Protons
C. Neutrons
D. Nuclei
B. Protons
This is because protons decide what element it is.
BC
The correct answer is B. Protons.
To determine the number of protons in an atom, you need to look at the atomic number of the element. The atomic number defines the identity of an element and indicates the number of protons in its nucleus.
Here is how you can find the atomic number of an element:
1. Open a periodic table of elements. You can find one online or refer to a printed version.
2. Locate the element that you are interested in. Elements are usually listed in order of their atomic numbers.
3. Look at the atomic number of the element. This is usually displayed above or below the symbol of the element. For example, the atomic number of hydrogen (H) is 1, while the atomic number of carbon (C) is 6.
4. The atomic number tells you the number of protons in the nucleus of that element's atoms. Since the number of protons is unique for each element, it always differs in atoms of different elements.
In the case of the given question, the correct answer is B. Protons because the number of protons always differs in atoms of different elements.