Which of the following happens during a chemical change? Check all of the boxes that apply
0 One atom or more changes into atoms of another element.
New substances with different properties are formed.
O Solids, liquids, or gases may form.
0 Reaction mixtures always give off some heat.
0 Reaction mixtures always need to be heated.

The minerals found in bones are deposited by living cells called

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

The fact that the total amount of energy in a system remains constant is a(n)