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Worksheets1st Semester Science Final Review I
Total questions: 15
Worksheet time: 8mins
Which of the following statements is true about electrons?
Adding or removing an electron from an atom changes the net charge.
Adding or removing an electron from an atom changes the atomic mass.
Adding or removing an electron from an atom changes the type of chemical element.
Electrons are located in the nucleus of an atom.
An atom can have a charge when the _____ number changes.
How many neutrons does the element on the periodic square have?
5
4
9
Not possible to determine
Ionization energy is _____.
Atomic radius on the periodic table _____.
Decreases from left to right across a period.
Remains constant from top to bottom within a group.
Increases from left to right across a period.
Decreases from top to bottom within a group.
Photosynthesis is how plants make _____.
Ca will form a Lewis dot diagram with _____ electrons.
Which of the following shows the elements in order from smallest to largest atomic mass?
Rb, Cl, K, Br
K, Br, Rb, Cl
Br, Cl, Rb, K
Cl, K, Br, Rb
How do you estimate the atomic mass of an atom?
Which of the following has the highest ionization energy?
Aluminum (Al)
Strontium (Sr)
Fluorine (F)
Barium (Ba)
Which type of reaction is pictured?
endothermic
exothermic
covalent
ionic
Which of the following is a nonmetal?
Sodium (Na)
Iron (Fe)
Oxygen (O)
Zinc (Zn)
The graph depicts the radii trends of the periodic table.
Which elements are in the same periodic family (group) based on this graph?
Na and K
F and K
Cs and Po
Na and Br
The chemical reaction between lithium and chlorine are reprsented below:
2Li + Cl2 -------> 2 LiCl
Which statement below best explains why the reaction takes place?
The valence electrons of lithium and chlorine are shared in an ionic bond.
Lithium shares a valence electron with chlorine to form a positively charged compound.
Chlorine an share some electrons with lithium to form a covalent bond.
The attractive forces between lithium and chlorine are so strong they always react.
How does the number of valence electrons in beryllium (Be) compare with those of oxygen (O)?
