An ion of calcium has a charge of 2+. The ion contains 18 electrons. How many protons does a neutral atom of calcium possess? 18

20

36

2
2

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons

Volume is a measurement of how fast particles of a substance are moving

The molar mass of cu is 63.55 g/mol. the number of grams of cu produced in this reaction is