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.

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

gold is my favorite solid.