Integrated Science A - Unit 3: Exam
when an alkali metal is involved in a chemical reaction with a nonmetal, what charge will its atoms most likely form?
1+
the alkali earth metal beryllium (be) engages in a chemical reaction and loses all of its valence electrons. what charge does beryllium have after the chemical reaction?
2+
when an element in the oxygen family is involved in a chemical reaction with a metal, what charge will its atoms most likely form?
2-
given the image, how many covalent bonds can one atom of carbon form?
4
match each letter listed to the correct family of elements.
a : alkali metals h : halogens i : noble gases d : boron family
according to the octet rule, what is true about the reactivity of halogens?
a halogen atom has seven electrons in its valence shell, so halogens are very reactive.
which options correctly describe characteristics of noble gases? select all that apply.
all noble gases have a unique atomic fingerprint. all noble gases have valence shells with 8 electrons.
which options correctly describe similarities between the elements boron (b), aluminum (al), and gallium (ga)? select all that apply.
all three elements are part of the boron family. all three elements tend to form 3+ cations when reacting with metals.
which molecular formula is written incorrectly?
br_4cl
given that bromine (br) is a halogen, what can be inferred as true about bromine?
bromine tends to form anions when in chemical reactions with metals.
match each letter to the correct class of elements.
c : nonmetals b : metalloids a : metals
what is the chemical name and formula of a compound that has one carbon atom and four chlorine atoms?
carbon tetrachloride; ccl_4
which ionic compound contains a 2+ and 2− ion? select all that apply.
cas mgo
which elements have atoms that are likely to form an anion? select all that apply.
chlorine (cl) selenium (se) phosphorus (p)
which compounds are most likely to have covalent bonds? select all that apply.
co h_2o
atomic radius ____, as you move left to right across a period, and ____ as you move down a group.
decreases, increases
tristan is given the task of studying the compound co_2. before he even begins his research, what information can tristan obtain from the compound's chemical formula alone? select all that apply.
he can tell that the compound forms molecules he can tell the compound contains one atom of carbon and two atoms of oxygen.
which best describes why trey and his friends should go to the gazebo to be safe from the thunderstorm?
if lightning strikes the shed, the aluminum's free-floating electrons could easily conduct the electricity throughout the shed.
which option correctly orders the elements by increasing reactivity?
li < na < k
which compounds are most likely to have ionic bonds? select all that apply.
naf mgo
what is a property of an ionic compound? select all that apply.
resists melting at high temperatures conducts electricity and heat efficiently
examine the incomplete analogy. wind : swirls :: chemical bond : _[blank]_. which option best completes the analogy?
stretches
examine the false statement. the alkali earth metals have five valence electrons. select the rewording of the statement that is true.
the alkali earth metals have two valence electrons.
an atom of lithium (li) and an atom of chlorine (cl) engage in a chemical reaction. which correctly describes the structure of the resulting chemical compound?
the chemical compound will have a network structure.
which statements about the periodic table's organization are true? select all that apply.
the periodic table is organized by families. the periodic table is organized by atomic number.
which option describes nonmetals?
they conduct electricity poorly.
which option describes a common property of the elements, nitrogen (n), phosphorus (p), arsenic (as)?
they have the same number of valence electrons.
which statement about atoms of elements in the same group of the periodic table is true?
they share similar chemical properties and the same number of valence electrons.
