A scientist carried out several different procedures, each of which caused a change in matter. Select each procedure that is likely a chemical change.
Salt crystals were crushed into a fine powder.
оос
Bubbles were produced when iron was placed in acid.
Two liquids were combined, and a solid appeared.
A piece of metal melted when it was heated.
OO
A white substance turned blue when water was added.
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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