Heat moves in many ways. Heat can be moved by conduction. It is moved by convection. It is moved by radiation. moves from one solid to another solid. Objects must be
for conduction to occur. Heat moves from a burner to the pan. This happens when you turn a stove on to heat up a pan. The heat in the pan then moves to the food you are cooking. The heat from the blanket moves to your body to warm you up when you cover up with an electric blanket. In both situations. There is
between two objects.

is the movement of heat through liquids and gases. The movement creates a
. One example of convection is when you boil water in a pot. The water starts to boil from the bottom and the hot water moves up to the
. Then the cooler water is pushed
. A current of
water is formed. Another example is when a space heater is used to heat a room. The air near the heater is heated and circulates the room. This causes the heat to transfer between the hot and cooler air.

is the transfer of heat energy through waves. Heat energy is given off by the sun’s rays. We can feel the heat energy given off by a campfire. Radiation only travels in
. It differs from conduction and convection. This is because
contact or current is needed for the heat to transfer. The heat waves from radiation even travels through
space.

a chemical reaction happens

explanation:

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.

level 4 to level 2 : ))