Which of the following properties is the same for the isotopes of an element?

Which of the following elements is a negative ion?

An atom has an atomic number of 11. Which of the following statements is true?

Which of the following atoms A, B, C or D would form an ion with a charge of +1?

The atomic weight of carbon( atomic number 6) is 12. How many electrons does it have?

Which of the following statements is not true about atoms?

A beryllium atom has 4 protons,5 neutrons,4 electrons. What is the mass no. of this atom?

The two main parts of an atom are its:

What is the charge of an ion that has 20 protons and 18 electrons?

An isotope of cadmium has an atomic no. of 48 and a mass no. of 112. This cadmium ion has:

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