|1 An atom in the ground state has seven valence electrons.
This atom could be an atom of which element?
(1) calcium (3) oxygen
(2) fluorine (4) sodium
|2 What is the total number of electrons in an atom of
(1) 18 (3) 20
(2) 19 (4) 39
||atom protons =electrons
|3 A proton has a charge that is opposite the charge of
(1) an alpha particle (3) an electron
(2) a neutron
(4) a positron
|4 Which conclusion was a direct result of the gold foil
(1) An atom is mostly empty space with a dense, positively charged
(2) An atom is composed of at least three types of subatomic particles.
(3) An electron has a positive charge and is located inside the nucleus.
(4) An electron has properties of both waves and particles.
|5 Which statement identifies the element arsenic?
(1) Arsenic has an atomic number of 33.
(2) Arsenic has a melting point of 84 K.
(3) An atom of arsenic in the ground state has eight valence electrons.
(4) An atom of arsenic in the ground state has a radius of 146 pm.
|6 Which element has an atom with the greatest attraction
for electrons in a chemical bond?
(1) As (3) N
(2) Bi (4) P
||Definition of electronegativity
|7 Given the balanced equation representing a reaction:
H+(aq) + OH-(aq) ==> H2O(l)
In this reaction there is conservation of
(1) mass, only
(2) mass and charge, only
(3) charge and energy, only
(4) charge, energy, and mass
||always everything is conserved
|8 Which statement describes the composition of potassium
(1) The proportion by mass of elements combined in potassium chlorate is
(2) The proportion by mass of elements combined in potassium chlorate
(3) Potassium chlorate is composed of four elements.
(4) Potassium chlorate is composed of five elements.
||1-definition of a compound
|9 As a bond between a hydrogen atom and a sulfur atom is
formed, electrons are
(1) shared to form an ionic bond
(2) shared to form a covalent bond
(3) transferred to form an ionic bond
(4) transferred to form a covalent bond
||covalent is shared electrons
|10 Atoms of which element can bond to each other to form
chains, rings, and networks?
(1) carbon (3) hydrogen
(2) fluorine (4) oxygen
||organic chemistry questions about C