Due to the electrons in their orbitals, sodium, potassium and calcium tend to lose electrons when bonding. When these bonds are dissolved in water, these particles become ________ particles called ________
positively charged: cations
negatively charged; cations
positively charged; anions
negatively charged; anions
The Correct Answer is A
A. positively charged; cations: Sodium (Na), potassium (K), and calcium (Ca) are metals that lose electrons, becoming positively charged ions, called cations.
B. negatively charged; cations: Cations are always positive. A negative ion is an anion.
C. positively charged; anions: The term anion refers to a negatively charged ion, not a positive one.
D. negatively charged; anions: These elements do not gain electrons-they lose them and do not become anions.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is E
Explanation
A. presence of enzymes: Enzymes are biological catalysts that speed up reactions by lowering activation energy.
B. decreased concentration of reactants: Lower concentration means fewer collisions between molecules, which slows reaction rate.
C. lower activation energy: Lowering the activation energy makes it easier for reactants to form products, increasing reaction rate.
D. A & B: While A is correct, B is not.
E. A & C: Both enzymes and reduced activation energy increase reaction speed.
Correct Answer is C
Explanation
A. 46; haploid: A cell with 46 chromosomes is diploid, not haploid.
B. 23; diploid: A diploid cell has two sets of chromosomes—23 from each parent, totaling 46.
C. 46; diploid: Human somatic (body) cells contain 46 chromosomes (2n)—this is the diploid state.
D. 23; haploid: 23 chromosomes is the haploid number, found in gametes (sperm and eggs), not somatic cells.
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