Solder is a silver metal used to hold pipes together. When the solder is heated, it melts and acts as a type of metal "glue." Mrs. Hanley heats a piece of solder until it melts between two pipes. What best identifies the point at which a physical change first takes place?
A)when the solder melts
B)when the solder cools down
C)when the solder is a soft metal
D)when the solder becomes solid again
Answers: 3
Chemistry, 22.06.2019 08:30, melikefood01
Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?
Answers: 1
Solder is a silver metal used to hold pipes together. When the solder is heated, it melts and acts a...
Geography, 31.03.2020 00:22