Mystery Solutions Flashcards
What are different forms of the same elements?
Isotopes
What is the difference between the isotope and its element?
Isotopes have the same number of protons but different number of neutrons.
What is a charged atom called?
Ion
What happens when an atom loses an electron?
it becomes a cation
What happens when an atoms gains an electron?
it becomes an anion
What are radicals?
Groups of atoms that are chemically bound together, carry a net charge and behave like a single ion.
What is the half- life of radioactive substance?
The interval of time required for one-half of the atomic nuclei of a radioactive sample to decay
Group number of the periodic table is the:
number of electrons in the outer shell
Period number is the:
Number of shells containing electrons
What happens when you go down a group in the periodic table?
They increase in reactivity
What makes and element different from any other element?
There amount of protons
Atomic mass=
Number of protons + number of neutrons
What are the three forms of carbon that exists in nature?
Charcoal, diamond, lead- graphite
What is the difference between the three forms of carbon?
That they are arranged differently
Who laid the foundation for the arrangement of elements in the periodic table?
Dimitri Mendeleev
