2) the number of protons in the atomic nucleus ( also known as the atomic number ).
Elements will permanently have the same number of protons in their nuclei. Changing the proton number, by even just 1 proton, means a whole new element.
-In chemical reactions, the number of electrons will constantly change. -The number of neutrons can change too (the definition of an isotope is: an atom of the same element with the same number of protons but different number of neutrons).
-The number of isotopes doesn't necessarily identify an element. More than one element can have the same number of isotopes.
-The number of charges only tells us what group the element is in the periodic table, not the specific element itself.
Hope it helps!!
Answer:
44.01 g/mol
Explanation:
Add each elements atomic mass. For oxygen you will do that twice because their is two oxygens.
- Hope that helps! Please let me know if you need further explanation.
Answer: 37.0 °C , 42.5 °C
Explanation:
Answer:
Potassium has an atomic radius of 243pm
Calcium has an atomic radius of 194pm
Magnesium has an atomic radius of 145pm
Explanation:
Answer:
Halogens
Explanation:
The elements of 17th group of modern periodic table is known as halogens . The word halogen means salt former and compound which contains halogens are called salt.