Technetium Often Is Used to Image Areas of Bone Growth ${ } _ { 43 } ^ { 9 } T c ^ { + }$

question 57

Multiple Choice

Technetium often is used to image areas of bone growth because it is a radioisotope with a half-life of 6 hours that emits gamma rays. A ${ } _ { 43 } ^ { 9 } T c ^ { + }$ ion has __________ protons, __________ neutrons, and __________electrons.

• A) 99, 43, 98
• B) 43, 99, 42
• C) 43, 56, 42
• D) 56, 43, 43
• E) 43, 99, 43

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Definitions:

Independent Variable

A variable in an experiment or statistical model whose variation influences another variable's (dependent variable) outcomes.

Sample Regression Equation

A formula that estimates the relationship between a dependent variable and one or more independent variables, based on sample data.

Intercept

The value of the dependent variable when all independent variables are equal to zero in a regression equation.

Indicator Variable

A variable that takes a value of 1 if a specific condition is true and 0 if it is not.