Basic Atomic Structures
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Which of the following statements is true about covalent bonds?
Covalent bonds form from the sharing of electrons between atoms
Isotopes are __________.
versions of one element with a different number of neutrons.
Which of the following statements is true?
An orbital is a space around the nucleus of an atom where an electron is likely to be found.
Atomic mass does not include _______ in its calculation. The atomic number of an element is the number of _______.
electrons; protons
An atom has 5 protons, 2 neutrons, and 5 electrons. Which of the following is the atom’s mass number?
7
The number of ________ is the same across a period but increases when moving down a group?
electron shells
Which of the following statements is true about protons?
The number of protons in the nucleus is the defining property of an element.
Which of the following statements about ionic bonding is true?
It involves the electrostatic attraction between oppositely charged ions.
Which of the following statements about protons is true?
In chemistry, the term proton refers to the hydrogen ion, H+.
Which of the following statements is true about electrons?
They have a negative charge.
Which of the following statements is true about the periodic table?
All elements in a period have the same number of electron shells.
Which of the following statements is true?
The valence shell is the outermost occupied electron shell.
The molecular formula for baking soda is NaHCO3 This molecule is made up of 6 ____ and 4 _____?
atoms; elements
The number of protons is the same as?
The atomic number.
Cations can be defined as:
Positively charged ions.
When an atom gains an electron it _______.
becomes negative