Write the chemical symbols for three different atoms or atomic cations with 29 electrons.

are atom and cations with 29 number of electrons.

Explanation:

1) An element with atomic number 29 is copper.Which means that there are 29 electrons and 29 protons present in an atom of a copper. And it is represented s Cu as it is a neutral atom no net charge on the atom will written.

2) Zinc has atomic number of 30 . which means that there are 31 electrons and 31 protons present in an atom of a nickel. If zinc atom looses 1 electron it total number of electrons changes to 29 and that is represent as.

3) Gallium has  has atomic number of 31 . which means that there are 30 electrons and 30 protons present in an atom of a nickel. If zinc atom looses 2 electrons it total number of electrons changes to 29 and that is represent as.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates