TRUE OR FALSE : Electrons found in the innermost shell of an atom that determine its mass.
FALSE
Rubidium and strontium are both in Period 5 of the Periodic Table. Rubidium is in Group I. Strontium is in Group II. What is the valence electron for both atom
Rubidium 1; Strontium 2
What is the mass number of an atom with 20 electrons and 22 neutrons?
42
How does an atom become a cation?
By losing electrons
What is the atomic number of an element?
The
number of protons in its nucleus
What is the difference between an atom and an ion?
no charge and with charge
What is the main function of neutrons in the atomic nucleus?
They help hold the nucleus together
What happens to an atom when it becomes an ion with a charge of +1?
It loses an electron
How many particles in atomic orbitals of element Z with atomic number (28) and mass number (36)?
28
Is it possible for an atom’s atomic number to be larger than its atomic mass in a stable, naturally occurring element?
not possible
Element M forms M2+ ions. In which part
of the Periodic Table is M placed?
Group 2
Where are protons, neutrons, and electrons located within an atom?
nucleus and orbital
How do you calculate the mass number of an atom?
neutron + proton
How many particles in atomic nucleus of element Y with 18 protons and 18 electrons?
NO ANSWER
What is the atomic notation for an atom X with 9 protons, 8 neutrons, and 9 electrons?
Elements X and Y react to form a compound. Element X loses two electrons and element Y gains one electron. What is the formula of the compound?
XY2
How do electrons arrange themselves around the nucleus of an atom?
because its attracted to positive charge
Elements in the same group of the periodic table have the same number of
Electron shell
What does the period number in the periodic table indicate?
The number of electron shells
The Group I element potassium (K) forms an
ionic bond with the Group VII element
fluorine (F). Which two ions are produced?
K+ and F-
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