Calcium mass number is 40 and it has 20 protons, how many is its electrons?
20
Guess the element!!! This element has 40 protons & 51 neutrons
Zr (Zirconium)
The mass of Chromium is 52 and has 28 neutrons. How many electrons in Chromium?
24
This element has 56 electrons and 81 neutrons. What is this element?
Ba (Barium)
Using your periodic table, what is the mass of Iodine?
127
Using your periodic table, how many neutrons in Samarium?
88
Guess the element!! This element has 88 electrons and 138 neutrons.
Ra (Radium)
The mass of gold 197 and has 118 neutrons. What is its atomic number?
79
Guess the element! This element has 3 protons & electrons
Li (Lithium)
Magnesium has how many protons?
12
Platinum has the mass of 195. How many electrons it this element?
78
Hg (Mercury) has 80 protons, how many electrons does it have?
80
Guess this element! This element has 92 electrons, what element is this?
U (Uranium)
Germanium have how many neutrons?
41
This element atomic number is 47 and its mass is 108. Draw this element symbol on the whiteboard!
Ag
Hydrogen - 1, Hydrogen - 2, Hydrogen - 3 are isotopes. What is the atomic number of these isotopes?
1
