If it’s a negative number and a positive it might be 1.4
Answer:
Streak is tested by scraping a mineral across plate
Explanation: Hope this helps :)
Answer:
The correct answer is because they have same number of protons but different number of neutrons.
Explanation:
Isotopes are atoms of the same element but differ only in the number of neutrons in the nucleus, i.e. they have same atomic number but different mass number.
Mass number is affected as they have different number of neutrons, thus effecting their physical properties.
The number of electrons and protons are same, i.e. their atomic number is same and thus their chemical properties are same as chemical properties are determined by the atom’s electronic configuration and that relates to number of protons.
Explanation:
13 are the number of atoms
I think because its the only one to be liquid at normal temperatures.
