The average atomic mass for Barium is 137.327 amu. Which two isotopes do you think is in greater abundance?

Who discovered the electron?

What family is Bromine a part of?

Calculate the average atomic mass of lithium to the nearest thousandth, which occurs as two isotopes that have the following atomic masses and abundances in nature: 7.30% at 6.017 amu, and 92.70% at 7.018 amu.

What is the total number of electrons in an atom of Cu-65?

Atoms of different isotopes of the same element differ in their total number of

Silicon belongs to which family?

What is the equation to find out the charge of an ion?

What is the equation to calculate mass number?

For Ti-48, What is the mass number?

How many neutrons does Ti-48 have?

You start with 800 grams of a radioisotope.  In 21 hours there are 100 grams left.  How long is  the half-life?

Which of the following is NOT a property of covalent bonding?

How many neutrons are there Ni-62?

Which best describes NaCl

If Mg had a charge of 2+, how many protons are there?

Which element is more electronegative?

How many valence electrons does Boron have?

The electron configuration for an atom is 1s2 2s2 2p6 . What is the element?

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