level 1
What happens to the reactivity of elements as you move down Group 1 of the periodic table (alkali metals)?
A) Reactivity decreases
B) Reactivity increases
C) Reactivity stays the same
D) Reactivity disappears
Answer: B) Reactivity increases
Which element is a good conductor of electricity and has luster?
A) Sulfur
B) Carbon
C) Iron
D) Silicon
Answer: C) Iron
What is a cation?
A) A negatively charged ion
B) A positively charged ion
C) A neutral atom
D) A proton
Answer: B) A positively charged ion
In which type of bond do atoms share electrons?
A) Ionic
B) Covalent
C) Metallic
D) Nuclear
Answer: B) Covalent
How is an ion formed?
A) By gaining or losing protons
B) By changing the number of neutrons
C) By gaining or losing electrons
D) By splitting into smaller atoms
Answer: C) By gaining or losing electrons
Why do elements in the same group (column) of the periodic table have similar chemical properties?
A) They have the same number of protons
B) They have the same number of valence electrons
C) They have the same atomic mass
D) They have the same number of neutrons
Answer: B) They have the same number of valence electrons
What property distinguishes metalloids from both metals and nonmetals?
A) Malleability
B) High conductivity
C) Semi-conductivity
D) Low density
Answer: C) Semi-conductivity
Which of the following bonds involves "pooling" of electrons?
A) Ionic bond
B) Metallic bond
C) Covalent bond
D) Polar bond
Answer: B) Metallic bond
Which type of bond involves the transfer of electrons?
A) Covalent bond
B) Ionic bond
C) Metallic bond
D) Hydrogen bond
Answer: B) Ionic bond
Which subatomic particle has no charge?
A) Proton
B) Electron
C) Neutron
D) Nucleus
Answer: C) Neutron
How many valence electrons does an atom need to be stable?
A) 1
B) 4
C) 8
D) 2
Answer: C) 8
What group of elements is known as the noble gases?
A) Group 1
B) Group 14
C) Group 18
D) Group 17
Answer: C) Group 18
What type of bond is present in sodium chloride (NaCl)?
A) Covalent bond
B) Ionic bond
C) Metallic bond
D) Hydrogen bond
Answer: B) Ionic bond
What determines the identity of an element?
A) The number of electrons
B) The number of protons
C) The number of neutrons
D) The size of the nucleus
Answer: B) The number of protons
Where are neutrons located in an atom?
A) In the electron cloud
B) In the nucleus
C) Orbiting around the atom
D) Between protons and electrons
Answer: B) In the nucleus
What is a metalloid?
A) An element with properties of both metals and nonmetals
B) An element that is only a good conductor
C) An element that is highly reactive with water
D) A nonmetal that has metallic properties
Answer: A) An element with properties of both metals and nonmetals
Which of the following is a property of nonmetals?
A) Good conductivity
B) Shiny and malleable
C) Brittle and poor conductor of heat
D) Ductile
Answer: C) Brittle and poor conductor of heat
Which type of bond is most likely to form between two non-metals?
A) Ionic bond
B) Covalent bond
C) Metallic bond
D) Hydrogen bond
Answer: B) Covalent bond
What is the charge of an atom that has gained an electron?
A) Positive
B) Negative
C) Neutral
D) Doubled
Answer: B) Negative
What is the charge of a proton?
A) Negative
B) Positive
C) Neutral
D) Variable
Answer: B) Positive
What group of elements contains highly reactive nonmetals like fluorine and chlorine?
A) Group 18 - Noble gases
B) Group 1 - Alkali metals
C) Group 17 - Halogens
D) Group 2 - Alkaline earth metals
Answer: C) Group 17 - Halogens
Which property of metals is explained by metallic bonding?
A) Low melting points
B) Poor conductivity
C) Malleability and ductility
D) Brittleness
Answer: C) Malleability and ductility
How is an ionic bond formed?
A) By sharing electrons equally between two atoms
B) By transferring electrons from one atom to another
C) By pooling electrons between metal atoms
D) By neutrons interacting with protons
Answer: B) By transferring electrons from one atom to another
What happens when an atom loses one or more electrons?
A) It becomes a cation
B) It becomes an anion
C) It becomes neutral
D) It becomes a proton
Answer: A) It becomes a cation
How are metallic bonds different from ionic and covalent bonds?
Answer: Ionic compounds tend to have high melting and boiling points, are brittle, and conduct electricity when dissolved in water. Covalent compounds usually have lower melting points, are not as brittle, and do not conduct electricity in water.