Solid- molecules vibrate in place and tightly packed
liquid-molecules fur shape of container and can slide past each other
gas-molecules also fit shape of container and have the most room
Answer:
The period 4 alkaline-earth metal has the name Calcium. An isotope of this element having 20 neutrons has a mass number of 40.
Explanation:
Looking at the periodic table 4th row for the alkaline-earth metal, we can find Calcium which has an atomic number of 20 (or protons number, or z). The mass number is given by the sum of protons and neutrons. If the number of protons in this case is 20 and the number of neutrons is also 20, the mass number A = 40.
Answer:
a martin year is as twice as long
Explanation:
i think
Answer:
They start with the planet furthest from us then go down the line of how many miles from us it is. Mars and Venus are the closests to us.
Explanation:
Its showing miles away it is and how fast it rotates and scientists study and analyze that.
<em>You can separate your lab materials for each flame test and color code them using non-flammable labels.</em>
<em>It helps a ton when I do lab tests ....</em>
