HSPS Practice Milestones stuff 2023 Woodfin PAGES 1-10
A diagram of a lithium atom and a uorine atom is shown below. When lithium reacts chemically with uorine, the outermost electron of lithium will transfer to which numbered area in the diagram?
3
In which region of the table would nonmetals be found?
3
How many protons and neutrons are there in an atom of 11/5 B?
5 protons and 6 neutrons
In order to be identi ed as the element carbon (C), an atom must have
6 protons
Which two elements are most likely from the same family or group in the periodic table?
Sodium and potassium
Why is the compound sodium chloride stable?
Sodium loses one electron and chlorine gains one electron.
Which best describes the relationship between subatomic particles in any neutral atom?
The number of protons equals the number of electrons.
According to the periodic table, the neutral atom of what element has 4 protons, 5 neutrons, and 4 electrons?
beryllium
This is an electron dot diagram: Which element is represented?
bromine
Which substance is electrically neutral?
lithium
Isotopes of an atom could be detected based on which of the following characteristics?
nuclear mass
Which of the following elements has the same Lewis dot structure as silicon?
(Ge)
According to the periodic table, which statement correctly describes the change from a neutral atom of an element to its ion?
A phosphorus atom forms a P3 ion by gaining three electrons.
What is the correct formula for aluminum oxide?
Al₂O₃
Which atom has a net positive charge?
Atom Y
An atom with which atomic diagram has chemical properties most similar to calcium?
C
Below are four ball-and-stick models representing compounds. Which of these models best represents ammonia (NH3)?
C
Iodine would have chemical properties most like
Chlorine (Cl)
Potassium (K), atomic number 19, willmost likely react with which of the following elements?
Chlorine (Cl), because it is a nonmetal.
Which of the following ordered pairs of elements shows an increase in atomic number but a decrease in average atomic mass?
Co to Ni
A model of two atoms is shown below. Which of the following would result if a covalent bond is formed between the two atoms?
Each atom would share four of its electrons with the other atom.
Which element is a poor conductor of heat?
Fe
Which of the following describes the type of bonding shown in the diagram?
Ionic
Sara wants to know if lithium (Li) and bromine (Br) will bond. She uses the following table to nd the properties of the two elements. Which statement describes the type of bond formed from these two elements?
Li is a metal and Br is a nonmetal that will form an ionic bond.
The Lewis dot structure shown below represents an atom of an unknown metallic element M. When atoms of this unknown metal react with oxygen, a compound is formed. Which of the following is the most likely chemical formula of the resulting metal oxide?
M2O
Laughing gas is a compound containing a ratio of two atoms of nitrogen to one atom of oxygen. What is the formula
N2O
Which element in this group would be the least likelyto react with other elements?
Neon
How would the element in position X be classi ed?
Nonmetal
Which of the following statementsbestexplains why potassium (K) reacts easily with bromine (Br)?
Potassium has one electron in its highest energy level, and bromine needs one electron to complete its highest energy level.
Which of the following statements describes properties of most metals?
They have high melting and boiling points.
Which of the following statements describes the elements in family 16 of the periodic table?
They have six valence electrons.
Which of the following statements best describes how Atom X and Atom Y are related?
X and Y are isotopes of the same element.
Which element will gain only one electron during a chemical reaction?
chlorine
A cube of an unknown metal has a volume of 2.25 cm and a mass of 16.2 g. Based on data in the table above, what is the identity of this metal?
chromium
What type of bonding occurs between these two atoms?
covalent
Element X has an atomic number of z. Which unidenti ed element has an atomic number of z+ 2?
element G
Element X reacts with potassium (K) to produce the compound K2X. The table below shows the number of valence electrons in four elements. Valence Electrons in Four Elements Element Number of Valence Electrons Hydrogen (H) 1 Nitrogen (N) 5 Oxygen (O) 6 Fluorine (F) 7 Which element listed in the table is most likely element X?
oxgyen
Which pair of elements would most likely bond to form a covalently bonded compound?
phosphorus and oxygen
Which combination of elements would most likely form an ionic compound?
sodium and fluorine
Carbon reacts with chlorine to form CCl4. What is the name of this compound?
tetracarbon chloride
What characteristic is di erent in each isotope?
the number of neutrons in the nucleus
