Answer:
An electron in the outer energy level of an atom
Explanation:
Because it is responsible for the chemical properties of the atom and also participates in chemical bonds
It should be mass and speed so they are both incorrect because the height doesn’t mean much, but what matters is how heavy the object is, and how fast it’s going to go.
Answer:
Sr<Ca<Be
Explanation:
Br, Ca, and Sr are all elements of same group as they all have 2 valence electrons. As we move down in a group, a new shell is being added that increases the size of the atom. As the size of an atom increases, it is easy to remove the electron from it's outer most shell in it's gaseous state. Since, Be is above Ca and Ca is above Sr. The size increases in the order, Be < Ca < Sr. It means Be is the smallest one of them and so it's hard to remove from it's outer most shell and hence it's ionization energy is higher.
Sr is largest one in these three elements and so it's easy to remove outer most electron from it that means the ionization energy is least. Ca is between Be and Sr.
So, an increasing order of ionization energy is Sr<Ca<Be
mark brainliest:)
A. 2
The dash represents two electrons
Answer:
The best option is "Heat is transferred by the interaction of moving particles."
Explanation:
The Kinetic Molecular Theory of Heat states that molecules in a fluid increase their speed as temperature increases.
Kinetic theory of heat is a theory that the temperature of a body is determined by the average kinetic energy of its particles and that an inflow of heat increases this energy.
Heat and temperature are related to each other, but are different concepts.
1. Heat is the total energy of molecular motion in a substance while temperature is a measure of the average energy of molecular motion in a substance.
2. Temperature does not depend on the size or type of object.
Also heat can be transferred but temperature can't be transferred.
