WorksheetsSunday quiz - Atoms
Total questions: 20
Worksheet time: 20mins
The average atom is about one-tenth of a billionth of a meter across. The largest non-radioactive atom (cesium) is approximately nine times bigger than the smallest atom. Which of the following is the smallest atom?
Hydrogen
Helium
Lithium
Fluorine
Neon
What is the total number of protons, neutrons and electrons in a Palladium dipositive ion, Pd+2, that has a mass number of 106?
46 protons, 106 neutrons, 106 electrons
46 protons, 60 neutrons, 44 electrons
46 protons, 58 neutrons, 46 electrons
46 protons, 60 neutrons, 46 electrons
A neutral atom of an element has 2 electrons in the first energy level, 8 in the second energy level and 8 in the third energy level. This information does not necessarily tell us
the atomic number of the element
anything about the element's chemical properties
the total number of electrons in s orbitals
the total number of electrons in p orbitals
the number of neutrons in the nucleus of an atom of the element
Which of these iso-electronic species has the smallest radius
Br−
Sr+2
Rb+
Se2−
They are all the same size because they have the same number of electrons
Which of the following pairs are isotopes?
Oxygen and Ozone
Hydrogen and Deuterium
Ice and steam
Nitric oxide and Nitrous oxide
In the periodic table the relative atomic masses of most elements are not given as whole numbers. This is majorly because
They cannot be determined accurately
The atoms ionize during determination of their masses
They exist as a mixture of isotopes
The preparation has the presence of other element impurities
The Sun, like others stars, is a ball of gas. In terms of the number of atoms, it is made of 91.0% hydrogen and 8.9% helium. By mass, the Sun is about 70.6% hydrogen and 27.4% helium. So naturally the electromagnetic waves produced by the sun must be from the emission spectrum of these two gases.
Does the sun produce microwaves?
True
False
What would be the most abundant element by mass in the human body?
Carbon
Hydrogen
Oxygen
Calcium
The radius of the nucleus of an atom is approximately
1 micrometer
1 nanometer
1 Angstrom
1 fermimeter
Cathode rays take a dominant position in the history or atomic structure determination. Which of the following statements is not correct about the characteristics of cathode rays?
They travel in a straight line in the absence of an external electrical or magnetic field. They can cast sharp shadows.
Characteristics of cathode rays vary based on the material of electrodes in cathode ray tube.
Electric field and magnetic field deflect cathode rays.
The objects hit by cathode rays get heated.
Based on the cathode ray experiment, JJ Thomson suggested the plum pudding model or the watermelon model for the atom. Which of the following properties of atom could not be explained by JJ Thomson?
Electrical neutrality of atoms
Existence of electrons
mass of atoms
Existence of isotopes
Canal rays or anode rays are the positively charged radiations in the discharge tube experiment under the conditions that a perforated cathode is used. The nature of the anode rays depend on which of the following?
The nature of discharge tube.
The nature of residual gas.
The nature of electrode.
All the above
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
Zinc
Copper
Nickel
Germanium
The periodic table is organized by the number of ______ in each element's nucleus
neutrons
protons
nucleons
atoms
what type of wave is used for phones and WiFi
radio
micro
UV
Xray
This image is an illustration of
photoelectric effect
diffraction effect
particle interference effect
wave interference effect
What is an electron cloud?
Region of atom that represents a 50% probability of finding an electron
region of atom that has a uniform electron density
an orbital
region of atom where the electron is not located
