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Which is only a physical change?
water
Melting of ice
reactive
Positively charged protons
increases
salt and iron
a compound because it is made of two types of atoms
forms one or more new substances
A mixture that can be separated with a magnet is
water
Melting of ice
reactive
Positively charged protons
increases
salt and iron
a compound because it is made of two types of atoms
forms one or more new substances
A chemical change always
water
Melting of ice
reactive
Positively charged protons
increases
salt and iron
a compound because it is made of two types of atoms
forms one or more new substances
Hydrogen is not longer used in balloons because it is too
water
Melting of ice
reactive
Positively charged protons
increases
salt and iron
a compound because it is made of two types of atoms
forms one or more new substances
A molecule of carbon dioxide (CO2) is made of one atom of carbon and two atoms of oxygen.
water
Melting of ice
reactive
Positively charged protons
increases
salt and iron
a compound because it is made of two types of atoms
forms one or more new substances
Food cooks faster at higher temperature. This is because, as the temperature increases, the rate of a chemical reaction usually
water
Melting of ice
reactive
Positively charged protons
increases
salt and iron
a compound because it is made of two types of atoms
forms one or more new substances
Which of the following substances an example of a compound?
water
Melting of ice
reactive
Positively charged protons
increases
salt and iron
a compound because it is made of two types of atoms
forms one or more new substances
Which subatomic particles are found in the nucleus of an atom?
water
Melting of ice
reactive
Positively charged protons
increases
salt and iron
a compound because it is made of two types of atoms
forms one or more new substances
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