CHEMISTRY SEMESTER 1 EXAM

Front

What are significant figures?

Back

Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Front

How many significant figures are in the number 5.00000008?

Back

There are 9 significant figures in the number 5.00000008.

Front

What do elements in the same group of the periodic table have in common?

Back

Elements in the same group have the same number of valence electrons.

Front

Which of the following is a nonmetal: Pt, V, Li, Kr?

Back

Kr (Krypton) is a nonmetal.

Front

How many significant figures are in the measurement 0.900 g?

Back

0.900 g has 3 significant figures.

Front

Which element is the most electronegative: lead, francium, oxygen, aluminum?

Back

Oxygen is the most electronegative element among the options.

Front

What is the definition of electronegativity?

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons are the outermost electrons of an atom and are involved in forming bonds with other atoms.

Front

What is the difference between metals and nonmetals?

Back

Metals are typically good conductors of heat and electricity, malleable, and ductile, while nonmetals are poor conductors and are often brittle.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of chemical elements, organized by increasing atomic number, electron configuration, and recurring chemical properties.