Physical Science? (isotopes or different elements)?

Question

Use the information to determine if the pair of elements are isotopes or different elements.

1. Element D has 6 protons and 7 neutrons.
Element F has 7 protons and 7 neutrons.

2. Element J has 27 protons and 32 neutrons.
Element L has 27 protons and 33 neutrons.

3. Element X has 17 protons and 18 neutrons.
Element Y has 18 protons and 17 neutrons.

4. Element Q has 56 protons and 81 neurtons.
Element R has 56 protons and 82 neutrons.

5. Element T has an atomic nu,ber or 20 and an atomic mass of 40.
Element Z has an atomic number of 20 and an atomic mas of 41.

6. Element W has 8 protons and 8 neutrons.
Element V has 7 protons and 8 neutrons.

How can you tell which is which? I am really confused. I don't know how to tell if it is an isotope or a different element. Please help!?

Answer 1

Isotopes have a diff # of Neutrons.
so 1 is a different element, 5 is an isotope, etc

Answer 2

The atomic number is equal to the number of protons, and tells you which element it is.

The number of protons plus the number of neutrons gives you (approximately) the atomic mass.

Different isotopes have the same atomic number but different atomic masses. For example, 12C (the most common isotope of carbon by a long way) has 6 protons and 6 neutrons. 14C, a rare isotope used in radiocarbon dating, has 6 protons (must be six or it wouldn't be carbon) and 8 neutrons.

Answer 3

a million)The melting factor to silver is a____. c actual property 3) The mass of the products from a chemical reaction _____ the mass of reactants. c same as 4) extra often than no longer nonmetals are ____. none of those 5) extra often than no longer metals are ____. d good conductors of heat 6) The atomic huge form is the form of ____ interior the nucleus. d protons 7) the skill of a pond to freeze is ___. a actual property 8) 3 examples of tangible replace are ____. c melting ice, mowing backyard, carving statue 9) which form of capability is launched or absorbed in maximum chemical reactions? d warmth capability 9) Do isotopes have same form of protons, distinctive form of neutrons? sure 10) which isn't an illustration of chemical replace? a transformation in state 13) what are the 6 important aspects that make up living remember? C, H, O, P, .... 14) how many chemical bonds can each and every carbon atom from? d 4

Answer 4

isotopes have an odd number of electrons. draw out your shells