WorksheetsAtoms, Elements and Periodic Table Review #1
Total questions: 15
Worksheet time: 8mins
_________________ is considered the "father of modern chemistry” because he first organized all known elements into four different groups?
Johann Wolfgang Döbereiner
Antoine Lavoisier
Dmitri Mendeleev
Henry Moseley
The elements in group 18 of the periodic table are all called noble gasses and they have the same
atomic number.
atomic mass.
number of possible isotopes.
number of valence electrons.
While looking at Calcium (Ca) on the periodic table, a student needs to find an element with a smaller atomic mass in the same group. Where should the student look?
directly up
directly down
to the left on the same row
to the right on the same row
The arrow is pointing to sodium's
number of neutrons.
number of valence electrons.
combined number of neutrons and protons.
combined number of electrons and protons
All atoms of the same element must have the same number of
protons
neutrons
compounds
electrons
An atom of the element Potassium (k) has an atomic number of 19 and a mass number of 39. How many protons does an uncharged zinc atom have?
19
39
58
20
Scientists in a lab are working with two different samples of the element Lead (Pb). They know that the different samples are different isotopes.
Which property of the isotopes must be different?
the atomic number
the electric charge
the element name
the mass number
When an atom that has no charge loses two electrons, it becomes a
positive ion.
negative ion.
positive isotope.
negative isotope.
What are the two parts of an atom?
the nucleus and the proton cloud
the neutron and the electron cloud
the neutron and the proton cloud
the nucleus and the electron cloud
Which argument best explains the charge of an atomic nucleus?
An atomic nucleus is positively charged because it is composed of neutrons.
An atomic nucleus is positively charged because it is composed of protons.
An atomic nucleus is negatively charged because it is composed of electrons.
An atomic nucleus is negatively charged because it is composed of neutrons.
The Venn diagram compares protons with electrons. Which shared property belongs in the region marked "B”?
Is found in the nucleus
Has mass of 1 amu
Orbits the nucleus
Is electrically charged
Which statement describes a property of a proton?
is found outside the nucleus
has a positive charge
has less mass than an electron
is repelled by electrons
Which best compares and contrasts how John Newlands and Dmitri Mendeleev organized elements?
Both Newlands and Mendeleev arranged elements according to their chemical properties, but only Newlands used atomic mass as well.
Both Newlands and Mendeleev arranged elements according to their atomic masses, but only Mendeleev used chemical properties as well.
Both Newlands and Mendeleev organized elements into groups, but only Newlands used a table with rows and columns.
Both Newlands and Mendeleev organized elements into a table with rows and columns, but only Mendeleev named different groups of elements.
Rounded to the nearest whole number, what is the atomic mass of platinum?
78
117
195
273
The symbol P represents the element phosphorus. This element’s atomic number is 15. How many protons and electrons are in a P–3 ion?
15 protons and 3 electrons
12 protons and 15 electrons
15 protons and 18 electrons
18 protons and 15 electrons
