Test tasks

 
1. Which of the following has a net negative charge?

A. A cation
B. An anion
C. A proton
D. A neutron
E. None of the above
2. All matter consists of particles called … .
A. Atoms
B. Units
C. Cubes
D. Molecules
E. Pints
3. The three basic components of an atom are:
A. Protons, neutrinos, and ions
B. Protons, neutrons, and electrons
C. Antiprotons, electrons, and ions
D. Protons, neutrons, and ions
E. Protium, deuterium, and tritium
4. Each proton has a … electrical charge.
A. Negative
B. Neutral
C. Shocking
D. Positive
E. No right answer
5. The nucleus of an atom contains protons and …
A. Positron
B. Electrons
C. Neutrons
D. Haptons
E. Antiprotons
6. Electron move around … the nucleus.
A. Inside
B. Outside
C. On top of
D. Without
E. Within
7. The number of protons in a calcium atom is:
A. 40
B. 22
C. 41
D. 39
E. 20
8. Identify the incorrect statement below:
A. The electron and proton have charges of equal magnitude and opposite sign.
B. The atomic number is the number of protons in the nucleus.
C. The atomic weight is the number of atoms in one mole of the element.
D. An atom is the smallest particle of an element that maintains the chemical identity of that element.
E. The number above the element symbol on the periodic chart is the atomic number.
9. According to atomic theory , electrons are usually found:
A. In the atomic nucleus
B. Outside the nucleus , yet very near it because they are attracted to protons
C. Outside the nucleus – most of an atom’s volume is the electron cloud
D. Anywhere they want to be – no particular location is more likely than any other
E. No right answer
10. Russian scientist who developed atomic-molecular science and used it first time?
A. Antoine Lavoisier
B. Dmitri Mendeleev
C. Marie Curie
D. Louis Pasteur
E. Mikhail Lomonosov
11. How many total atoms are in a molecule of water?
A. Two atoms
B. Three atoms
C. One atoms
D. Four atoms
E. No atoms
12. Atomic number is number of …
A. Protons (p+)
B. Electrons (e-)
C. Neutrons (n0)
D. Nucleons (p+ and n0)
E. Neutrons (p+)
13. Chemical element are represented by Latin or Greek …
A. Alphabets
B. Gods
C. Illusions
D. Symbols
E. Word
14. Elements which have same number of protons but different number of neutrons are called as
A. Isomers
B. Isotopes
C. Allotropes
D. Allomers
E. Complex
15. Neutron number is denoted by symbol.
A. A
B. P
C. N
D. Z
E. M
16. When electrons are passed through electromagnetic field, electrons are deflected away from.
A. Negative plate
B. Positive plate
C. Neutral plate
D. Oxidation plate
E. Reduction plate
17. Number of proton , neutron and electron in potassium
A. 19 , 19 , 19
B. 19 , 19 , 20
C. 20 , 20, 19
D. 20 , 19 , 20
E. 19 , 20 , 19
18. Pathway of electron is called?
A. Orbit
B. Orbital
C. Electric path
D. Axis
E. Neutral plate
19. Every substance in our world is made up of …
A. Chemical elements
B. Metals
C. Non-metals
D. Metalloids
E. Electrons
20. Particular element posses same number of electrons hence have same
A. Physical properties
B. Chemical properties
C. Density
E. All of above
21. Elements which are found on their own in nature as free elements are … and …
A. Gold , nitrogen
B. Gold , carbon
C. Gold , silver
D. Gold , coal
E. Oxygen , hydrogen
22. Which of the following elements is classified as a metal?
A. Boron
B. Fluorine
C. Iron
D. Carbon
E. Chlorine
23. Which of the following atoms has six valence electrons?
A. Silicon
B. Boron
C. Sulfur
D. Sodium
E. Carbon
24. Which of the following statement is true?
A. Matter is composed of large particles called atoms.
B. Atoms may be divided in ordinary chemical reactions.
C. Atoms of the same element may have different masses.
D. Atoms can never combine with any other atoms.
E. All of above
25. A nuclear particle that has about the same mass as a proton , but with no electrical charge , is called …
A. A nuclide
B. An electron
C. An isotope
D. A proton
E. A neutron
26. An electron is in a region outside the nucleus. An electron …
A. Is larger than a proton and has no charge
B. Has less mass than a proton and has a negative charge
C. Has a positive charge
D. Is smaller than a proton and has no charge
D. All of above
27. The periodic table shows that a carbon atom has six protons. This means that a carbon atom also has …
A. Six electrons
B. More protons than electrons
C. Seven neutrons
D. An atomic mass that an atom
E. Seven electrons
28. When you change the number of electrons on an atom , you produce a different :
A. Element
B. Atomic mass
C. Isotope
C. Chemical bond
E. Ion
29. Which of the following statements is not an idea from Dalton’s Atomic theory?
A. All atoms of a given element have identical properties which differ from those of all other elements.
B. Atoms can only be transformed into atoms of another element by nuclear reactions.
C. An element is composed of extremely small indivisible particles called atoms.
D. The relative number and kind of atoms are consistent in a given compound.
E. Compounds are formed when atoms of different elements combine with each other in small whole-number ratios.
30. What is the electron configuration for nitrogen, atomic number 7?
A. 1s22p22p3
B. 1s22p32p2
C. 1s22p32p1
D. 1s22p22p23s2
E. 1s22p12p2