WorksheetsExam1_Review
Total questions: 25
Worksheet time: 27mins
Which subatomic particle determines the identity of an element?
Electron
Proton
Neutron
Nucleus
Which of the following is a halogen?
Sodium
Chlorine
Magnesium
Neon
Which type of electromagnetic radiation has the longest wavelength?
X-rays
Ultraviolet
Visible light
Radio waves
In the Bohr model, an electron moving from n = 5 to n = 2 will:
Absorb energy
Emit a photon
Lose protons
Ionize the atom
Which orbital can hold a maximum of 6 electrons?
s
p
d
f
Which of the following elements has the lowest ionization energy?
F
Ne
Na
O
Which of the following formulas represents an ionic compound?
H2O
CO2
NaCl
NH3
What is the correct name of P2O5?
diphosphorus pentoxide
phosphorus oxide
phosphorus pentoxide
pentaphosphorus dioxide
Which of the following is a property of covalent (molecular) compounds?
High melting points
Conduct electricity in solution
Formed between metals and nonmetals
Exist as discrete molecules
The number of protons equals the atomic number. (T/F)
True
False
Anions are smaller than their parent atoms. (T/F)
True
False
Metals tend to form cations by losing electrons. (T/F)
True
False
Acids release hydrogen ions (H+) in aqueous solution. (T/F)
True
False
Silicon (Si) is classified as a metalloid. (T/F)
True
False
Match the description to the correct term.
A. Noble gases
Group 18 or 8A, chemically inert
B. d-orbital
Orbital that holds up to 10 electrons, c
C. Ionic bond
Electrons are transferred, forming oppos
D. Covalent bond
Bonding through electron sharing between
E. Halogens
Nonmetals that form salts with metals
Explain why atoms are electrically neutral overall.
Why does magnesium (Mg) form Mg2+ while oxygen (O) forms O2−? Relate to electron configurations.
Give two differences between ionic and covalent compounds, with examples.
Electron Configuration & Periodic Trends a) Write the full and shorthand electron configuration for sulfur (Z = 16). b) Predict the ion sulfur forms and give its electron configuration. c) Which element is isoelectronic with the S2− ion?
Atomic Mass & Formula Practice a) Naturally occurring chlorine consists of 75.8% Cl-35 (34.969 amu) and 24.2% Cl-37 (36.966 amu). Calculate the average atomic mass of chlorine (show your work). b) Give the chemical name, formula, and ions present in calcium nitrate.
Label the atom
negative
positive
neutral
Protons and Electrons = (a)
Neutrons = (b)
Henry, Aiden, and Anika are studying for their chemistry exam. They come across a question about naturally occurring chlorine. They find out that it is 75.78% 35Cl (atomic mass 34.969 amu) and 24.22% 37Cl (atomic mass 36.966 amu). They are trying to figure out the atomic weight of chlorine. Can you help them?
34.97 amu
35.45 amu
37.00 amu
35.00 amu
How many protons does this element have?
