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WorksheetsTEKS 8.5ABC Pre-Test
Total questions: 12
Worksheet time: 3600secs
What can be concluded from the information provided?
The nucleus contains protons and electrons
The nucleus contains a positive charge
The nucleus contains a negative charge
The nucleus contains neutrons and electrons
An atom has 29 protons, 29 electrons, and 35 electrons. What is the mass number of the atom?
(a)
Which atom diagram has chemical properties most similar to carbon?
Potassium (K), atomic number 19, will most likely react with-
Sodium (Na), because it is in the same column
Calcium (Ca), because it is in the same row
Chlorine (Cl), because it is a nonmetal
Argon (Ar), because it is a noble gas
Fluorine is a halogen and a nonmetal that is extremely toxic to humans. When combined with other elements it has many uses, including preventing tooth decay. Which information below identifies Fluorine (F)?
9 protons
9 neutrons
19 electrons
19 protons
Which of the following groups of elements are all malleable, conduct electricity and are lustrous?
Cl, He, Ne
Cu, Na, Mg
Mg, Ar, B
Si, As, Se
Which group of elements is least reactive?
Alkali metals
Alkaline earth metals
Halogens
Noble gases
Which element only has two valence electrons?
Potassium (K)
Sulfur (S)
Magnesium (Mg)
Neon (Ne)
A model of a beryllium atom is shown below. What types of particles are found in the atom's nucleus?
Positively charged particles and negatively charged particles
Negatively charged particles only
Neutral particles and positively charged particles
Positively charged particles only
