PHYSICAL SCIENCE END SEMESTER EXAM
ELABORATIONS. SAMPLE EXAM REVISION PRACTICE
QUESTIONS WITH CORRECT ANSWERS (2024 UPDATE)
The attractions between the shared electrons and the protons in each - ANSWER- nucleus hold
the atoms together in a covalent bond
When atoms form a polar covalent bond the atom with the greater attraction for electrons has a
partial negative charge - ANSWER- the other atom has a partial positive charge
The type of atoms in a molecule and its shape are factors - ANSWER- that determine whether
a molecule is polar or nonpolar `
Attractions between polar molecules are stronger - ANSWER- than attractions between
nonpolar molecules
The name and formula of a molecular compound describe - ANSWER- the type and number
of atoms in a molecule of the compound
The cations in a metal form a lattice that is held in place - ANSWER- by strong metallic bonds
between the cations and the surrounding valence electrons
The mobility of electrons within a metal - ANSWER- explains some of the properties of metals
Sciences can design alloys with specific properties by varying the types - ANSWER- and
amounts of elements in an alloy
When an atom loses an electron it forms and - ANSWER- anion
, The charge on a chloride ion in AICI3 is - ANSWER- 1-
Which pair has the same electron configuration - ANSWER- Cl- and Ar
A chemical bond that forms when atoms share electron is always - ANSWER- covalent bond
When two fluoride atoms share a pair of electrons the bond that forms is an - ANSWER-
nonpolar covalent bond
The chemical formula for magnesium bromide is - ANSWER- mgbr2
The compound with the formula sici4 is - ANSWER- silicon tetrachloride
The attraction among water molecules is stronger than the attraction among - ANSWER-
carbon dioxide molecule
Which type of solid is likely to be the best conductor of electric current - ANSWER- metal
element
What does each dot diagram represent - ANSWER- Each dot represents a valence electron.
What are subscripts used for in chemical formulas - ANSWER- . A subscript is used to show
the number of atoms of an element in a molecule or the ratio of ions in a crystal lattice
What is the name of binary compound formed potassium and iodine - ANSWER- Potassium
iodide
Dalton proposed the theory that all matter is made up of - ANSWER- indival particles called
atoms. Which cant e divided
ELABORATIONS. SAMPLE EXAM REVISION PRACTICE
QUESTIONS WITH CORRECT ANSWERS (2024 UPDATE)
The attractions between the shared electrons and the protons in each - ANSWER- nucleus hold
the atoms together in a covalent bond
When atoms form a polar covalent bond the atom with the greater attraction for electrons has a
partial negative charge - ANSWER- the other atom has a partial positive charge
The type of atoms in a molecule and its shape are factors - ANSWER- that determine whether
a molecule is polar or nonpolar `
Attractions between polar molecules are stronger - ANSWER- than attractions between
nonpolar molecules
The name and formula of a molecular compound describe - ANSWER- the type and number
of atoms in a molecule of the compound
The cations in a metal form a lattice that is held in place - ANSWER- by strong metallic bonds
between the cations and the surrounding valence electrons
The mobility of electrons within a metal - ANSWER- explains some of the properties of metals
Sciences can design alloys with specific properties by varying the types - ANSWER- and
amounts of elements in an alloy
When an atom loses an electron it forms and - ANSWER- anion
, The charge on a chloride ion in AICI3 is - ANSWER- 1-
Which pair has the same electron configuration - ANSWER- Cl- and Ar
A chemical bond that forms when atoms share electron is always - ANSWER- covalent bond
When two fluoride atoms share a pair of electrons the bond that forms is an - ANSWER-
nonpolar covalent bond
The chemical formula for magnesium bromide is - ANSWER- mgbr2
The compound with the formula sici4 is - ANSWER- silicon tetrachloride
The attraction among water molecules is stronger than the attraction among - ANSWER-
carbon dioxide molecule
Which type of solid is likely to be the best conductor of electric current - ANSWER- metal
element
What does each dot diagram represent - ANSWER- Each dot represents a valence electron.
What are subscripts used for in chemical formulas - ANSWER- . A subscript is used to show
the number of atoms of an element in a molecule or the ratio of ions in a crystal lattice
What is the name of binary compound formed potassium and iodine - ANSWER- Potassium
iodide
Dalton proposed the theory that all matter is made up of - ANSWER- indival particles called
atoms. Which cant e divided
